FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a double-free vulnerability in kerberos_AcceptSecurityContext() and kerberos_InitializeSecurityContextA() (WinPR, winpr/libwinpr/sspi/Kerberos/kerberos.c) can cause a crash in any FreeRDP clients on systems where Kerberos and/or Kerberos U2U is configured (Samba AD member, or krb5 for NFS). The crash is triggered during NLA connection teardown and requires a failed authentication attempt. This issue has been patched in version 3.24.2.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3562-1 advisory.

    - CVE-2026-27951: 32-bit system denial of service via endless blocking loop in `Stream_EnsureCapacity`     (bsc#1258939).
    - CVE-2026-33952: client denial of service via unvalidated authentication length field (bsc#1261196).
    - CVE-2026-33977: client denial of service via malformed IMA ADPCM audio data (bsc#1261198).
    - CVE-2026-33982: heap buffer overread in `winpr_aligned_offset_recalloc()` can lead to undefined behavior       (bsc#1261222).
    - CVE-2026-33983: improper error handling can lead to use of incorrect shift exponent, undefined behavior     and an 80       billion iteration loop (bsc#1261200).
    - CVE-2026-33984: heap buffer overflow allows arbitrary code execution via crafted pixel data     (bsc#1261211).
    - CVE-2026-33985: heap out-of-bounds read can leak sensitive data when pixel data is rendered to screen     (bsc#1261217).
    - CVE-2026-33986: heap out-of-bounds write due to H.264 YUV buffer dimension desync (bsc#1261223).
    - CVE-2026-33987: heap out-of-bounds write due to persistent cache `bmpSize` desync (bsc#1261226).
    - CVE-2026-33995: double-free in `kerberos_AcceptSecurityContext()` and     `kerberos_InitializeSecurityContextA()` can       lead to crash during NLA connection teardown with a failed authentication attempt (bsc#1261227).
    - CVE-2026-40033: heap buffer overflow in `gdi_CacheToSurface` allows attackers to cause a denial of     service or achieve       remote code execution (bsc#1266317).
    - CVE-2026-40254: off-by-one error in `contains_dotdot()` allows for drive channel path traversal     (bsc#1262743).
    - CVE-2026-44420: heap buffer overwrite can be triggered in server-side clipboard channel when a malicious     client sends       a `CB_CLIP_CAPS` PDU with a too-small `capabilitySetLength` (bsc#1267008).
    - CVE-2026-44421: improper validation in `gdi_CacheToSurface` can lead to a heap buffer overwrite client     when an RDP       server sends crafted RDPGFX PDUs (bsc#1267009).
    - CVE-2026-44422: improper memory management can lead to heap use-after-free/double-free in a client's     RDPEAR       authentication-redirection path (bsc#1267010).
    - CVE-2026-45700: data check bypass when decoding RLE planar data can lead to an out-of-bounds heap write       (bsc#1267011).
    - CVE-2026-56297: improper synchronization of `channel_callback` access can lead to use-after-free in       `dvcman_channel_close` and `dvcman_call_on_receive` triggered by a malicious RDP server (bsc#1271071).
    - CVE-2026-57156: integer overflow in `update_read_delta_points` allows malicious RDP peers to cause a     heap buffer       overflow (bsc#1271303).
    - CVE-2026-57157: 2-byte heap out-of-bounds read via attacker-supplied MS-RDPECAM `DeviceName` and     `VirtualChannelName`       fields (bsc#1271304).
    - CVE-2026-57158: incomplete fix for CVE-2026-23530 in `planar_decompress_plane_rle_only` allows a     malicious RDP server       to trigger a one byte buffer overflow via a truncated `RDPGFX_CMDID_WIRETOSURFACE_1` planar payload     (bsc#1271305).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22194-1 advisory.

    This update for freerdp fixes the following issues

    Update to version 3.26.0:

    - CVE-2026-33982: heap-buffer-overflow READ vulnerability at 24 bytes before the allocation, in       winpr_aligned_offset_recalloc() (bsc#1261222).
    - CVE-2026-33985: FreeRDP: Information disclosure via heap memory out of bounds read (bsc#1261217).
    - CVE-2026-33986: heap OOB write due to H.264 YUV buffer dimension desync (bsc#1261223).
    - CVE-2026-33987: heap OOB write due to persistent cache bmpSize desync (bsc#1261226).
    - CVE-2026-33995: double-free vulnerability in kerberos_AcceptSecurityContext() and       kerberos_InitializeSecurityContextA() (bsc#1261227).
    - CVE-2026-40033: heap buffer overflow in `gdi_CacheToSurface` allows attackers to cause a denial of     service or achieve       remote execute code (bsc#1266317).
    - CVE-2026-40254: off-by-one in contains_dotdot() allows drive channel path traversal (bsc#1262743).
    - CVE-2026-44420: Prior to 3.26.0, a malicious RDP client can trigger a heap-buffer-overflow write in     FreeRDP's server-       side clipboard (cliprdr) channel (bsc#1267008).
    - CVE-2026-44421: Prior to 3.26.0, a malicious RDP server can trigger a heap-buffer-overflow write in the     FreeRDP client       by sending crafted RDPGFX PDUs (bsc#1267009).
    - CVE-2026-44422: Prior to 3.26.0, a malicious-server-triggerable heap use-after-free / double-free in the     FreeRDP       client's RDPEAR authentication-redirection path exists (bsc#1267010).
    - CVE-2026-45700: n attacker can bypass the check with a large nDstStep and a large nXDst, causing       planar_decompress_plane_rle() to write past the end of pTempData (bsc#1267011).

    Changes:

     * cmake: Findyuv: Use correct pkgconfig name (#12666)
     * Remove deallocator attribute from rfx_message_free (#12681)
     * [winpr,utils] improve winpr/ntlm.h (#12677)
     * rdpecam-v4l: stop the capture thread when streaming is cleared (#12690)
     * fix(winpr,ncrypt): support PIV retired key slots for smartcard logon (#12684)
     * [core,instance] fix deprecation guards (#12691)
     * [ci,alt-arch] enable internal MD4, MD5 and RC4 (#12692)
     * Add VideoToolbox H.264 support for ffmpeg (#12694)
     * [client,common] add /args-from:file: syntax (#12697)
     * [ci,freebsd] update freebsd builds (#12698, #12700, #12701, #12702)
     * [client, android] UI modernization, SQLCipher and more (#12685, #12686, #12687, #12730,
     * #12731, #12736, #12737, #12688)
     * [cmake,deps] use alias target for sso-mib (#12706)
     * [core,settings] add auto reconnect triggered flag (#12709)
     * Force YUV420P when videotoolbox is used (#12711)
     * Release cleanups (#12712)
     * [gdi,gfx] fix bounds checks and proxy unit tests (#12713)
     * Improved input checks (#12714)
     * [winpr,utils] add unit tests for command line parser (#12716)
     * Cmdline fixes (#12717)
     * [codec,planar] fix bounds checks (#12718)
     * [client,common] add freerdp_client_settings_parse_command_line_argume... (#12724)
     * [winpr,sspi] clean up ntlm code (#12732)
     * Experimental AV1 support has been added. This currently works only with FreeRDP based servers.
     * Most notably there is now support for [MS-RDPEWA] (FIDO2 redirection)
     * Android client received a (small) facelift
     * Improved SDL3 client drawing performance
     * Console output support for SDL3 (windows) and windows native client
     * RDP proxy now supports NSCodec and RFX modes.
     * RDP PRoxy now has smartcard emulation and SAM file support (via config file)
     * Smartcard KSP support for NLA authentication
     * [winpr,wlog] add WLog_SetGlobalPrefix (#12497)
     * [channels,video] fix wrong cast (#12511)
     * [codec,openh264] reject encoder ABI mismatch on runtime-loaded library (#12510)
     * [client,sdl] create a copy of rdpPointer (#12512)
     * [codec,video] properly pass intermediate format (#12518)
     * [utils, signal] lazily initialize Windows CRITICAL_SECTION to match POSIX static mutex behavior     (#12520)
     * winpr: improve libunwind backtraces (#12530)
     * [server,shadow] remember selected caps (#12528)
     * Zero credential data before free in NLA and NTLM context (#12532)
     * [server,proxy] ignore missing client in input channel (#12536)
     * [server,proxy] ignore rdpdr messages (#12537)
     * [winpr,sspi] improve kerberos logging (#12538)
     * Codec fixes (#12542)
     * [winpr,sspi] Fix context nullptr handling (#12543)
     * Dev 3.24.3 dev0 (#12545)
     * Fix memory leak in gdi_create_bitmap() on gdi_CreateBitmap failure (libfreerdp/gdi/graphics.c) (#12547)
     * Fix memory leak in vgids_read_do_fkt() on Stream_New failure     (libfreerdp/emu/scard/smartcard_virtual_gids.c) (#12548)
     * Proxy config improve (#12549)
     * Proxy config improve (#12550)
     * [client,sdl] clamp cursor hotspot (#12553)
     * RFC: Research/av1 codec extension (#12527)
     * [winpr,kerberos] fix krb_log_context_encryption (#12555)
     * [client,sdl] fix global init return check (#12558)
     * Fix remote credential with windows11h2 (#12560)
     * Proxy scard auth improvements (#12561)
     * [winpr,sspi] guard krb5_get_etype_info (#12562)
     * [utils,smartcard] fix STATUS_BUFFER_TOO_SMALL (#12564)
     * [client,common] do not manipulate security settings for smartcard-logon (#12567)
     * [channels,audin] fix regression for microphone (#12570)
     * [client,sdl] add SDL_KMOD_MODE and SDL_KMOD_LEVEL5 (#12569)
     * Fix unbound strlen on slotDescription (#12571)
     * build: Update FindFFmpeg.cmake to support Apple frameworks with 'lib' prefix (#12565)
     * [channels,rdpewa] add WebAuthn virtual channel support (#12572)
     * [core] fix freerdp_get_nla_sspi_error always returning 0 on client (#12574)
     * [ci] enable rdpewa channel (#12576)
     * small refactoring (#12578)
     * Rdpewa unify notifications (#12581)
     * [client,sdl] fix crash when clicking 'cancel' on PIN popup (#12580)
     * [channels,drive] refine bounds checks (#12584)
     * fix: smartcard logon with ECC keys and minidriver-assigned container names (#12585)
     * Various papercuts (#12583)
     * fix: console output on Windows client (#12573)
     * [winpr,crt] dump stack on aligned memory errors (#12588)
     * [client,x11] keep scancode input for Ctrl/Alt/Super combinations in /kbd:unicode mode (#12590)
     * [codec,progressive] fix underflow guard in progressive_rfx_quant_sub (#12592)
     * fix: wfreerdp floatbar visibility (#12594)
     * [winpr,json] return a copy from WINPR_JSON_Print* (#12595)
     * [client,sdl] drop WITH_DEBUG_SDL_EVENTS (#12599)
     * Ncrypt and asn1 cleanup (#12604)
     * Video channel fix (#12593)
     * [codec,h264] fix media foundation backend (#12606)
     * fix(sdl): detect Hyprland and river in tryFallback() (#12608)
     * Proxy stress fixes (#12597)
     * Add new fuzzer tests (#12613)
     * fix(sdl): use SDL_Renderer instead of software surfaces (#12607)
     * fix(sdl): BFS neighbor walk pop/begin mismatch in addOrUpdateDisplay (#12614)
     * fix(sdl): promote first monitor as primary when subset excludes primary (#12618)
     * [ci,android] default to only aarch64 (#12622)
     * Fix process exit code on non-pidfd platforms (macOS, BSD)#12534) (#12586)
     * warning cleanups (#12626)
     * fix: prevent PostQuitMessage in RemoteApp WM_DESTROY handler (#12629)
     * [winpr,ntlm] fix message cleanup across the SSPI lifecycle (#12609)
     * Code bug fixes (#12632)
     * Oss fixes (#12633)
     * [client,android] add an option to enable keeping screen on when connected (#12630)
     * [client, android] Fix layout overlaps, migrate to AndroidX, and update UI components (#12628)
     * Proxy config tests (#12636)
     * Proxy config optional targethost (#12637)
     * [client,sdl] set SDL_HINT_SCREENSAVER_INHIBIT_ACTIVITY_NAME (#12639)
     * Nightly deb fix (#12640, #12641, #12649, #12650, #12642, #12643)
     * [winpr,input] fix korean keyboard mapping (#12646)
     * [client,sdl] set hints before SDL_Init (#12644)
     * Sdl inhibit option (#12647)
     * [client,X11] fix residual race in xf_clipboard_formats_free (#12648)
     * (sdl3): Fix oversized window on HiDPI Wayland (#12635)
     * [cache,bitmap] fix off-by-one in bitmap_cache_put bounds check (#12651)
     * [winpr,sspi] free fields buffer immediately (#12654)
     * [codec,dsp] fix fencepost error in dsp_ima_clamp_step (#12655)
     * RDPECAM MJPEG support
     * Support for FDK-AAC for sound and microphone redirection
     * Support timezones as JSON resources
     * Rely preferably on pkgconfig to pull devel packages instead of
     * A new option /cert that unifies all certificate related options (gh#FreeRDP/FreeRDP#5880)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:21436-1 advisory.

    Update to version 3.24.2.

    Security issues fixed:

    - CVE-2026-25941: out-of-bounds read in the FreeRDP client RDPGFX channel (bsc#1258919).
    - CVE-2026-25942: buffer overflow of global array in `xf_rail_server_execute_result` (bsc#1258920).
    - CVE-2026-25952: heap use-after-free in `xf_SetWindowMinMaxInfo` (bsc#1258921).
    - CVE-2026-25953: heap use-after-free in `xf_AppUpdateWindowFromSurface` (bsc#1258923).
    - CVE-2026-25954: heap use-after-free in `xf_rail_server_local_move_size` (bsc#1258924).
    - CVE-2026-25955: heap use-after-free in `xf_AppUpdateWindowFromSurface` (bsc#1258973).
    - CVE-2026-25959: heap use-after-free in `xf_cliprdr_provide_data_` (bsc#1258976).
    - CVE-2026-25997: heap use-after-free in `xf_clipboard_format_equal` (bsc#1258977).
    - CVE-2026-26271: buffer overread in FreeRDP icon processing (bsc#1258979).
    - CVE-2026-26955: out-of-bounds write in FreeRDP clients using the GDI surface pipeline (bsc#1258982).
    - CVE-2026-26965: out-of-bounds write in FreeRDP client RLE planar decode path (bsc#1258985).
    - CVE-2026-29774: heap buffer overflow in the FreeRDP client's AVC420/AVC444 YUV-to-RGB conversion path     (bsc#1259689).
    - CVE-2026-29775: out-of-bounds access in the FreeRDP client bitmap cache subsystem (bsc#1259684).
    - CVE-2026-29776: integer underflow in `update_read_cache_bitmap_order` (bsc#1259692).
    - CVE-2026-31806: heap buffer overflow in `nsc_process_message` (bsc#1259653).
    - CVE-2026-31883: heap buffer overwrite due to a `size_t` underflow in the IMA-ADPCM and MS-ADPCM audio     decoders       (bsc#1259679).
    - CVE-2026-31884: division by zero in MS-ADPCM and IMA-ADPCM decoders (bsc#1259680).
    - CVE-2026-31885: out-of-bounds read in MS-ADPCM and IMA-ADPCM decoders (bsc#1259686).
    - CVE-2026-31897: out-of-bounds read in `freerdp_bitmap_decompress_planar` (bsc#1259693).
    - CVE-2026-33952: client-side crash due to `WINPR_ASSERT()` failure in     `rts_read_auth_verifier_no_checks()`       (bsc#1261196).
    - CVE-2026-33977: client-side crash due to `WINPR_ASSERT()` failure in IMA ADPCM audio decoder     (bsc#1261198).
    - CVE-2026-33982: heap buffer overread in in `winpr_aligned_offset_recalloc` (bsc#1261222).
    - CVE-2026-33983: undefined behavior and resource exhaustion via 80 billion iteration loop in       `progressive_decompress_tile_upgrade` (bsc#1261200).
    - CVE-2026-33984: heap buffer overflow in ClearCodec `resize_vbar_entry` (bsc#1261211).
    - CVE-2026-33985: heap out-of-bounds read in `clear_decompress_glyph_data` (bsc#1261217).
    - CVE-2026-33986: heap out-of-bounds write due to H.264 YUV buffer dimension desync (bsc#1261223).
    - CVE-2026-33987: heap out-of-bounds write due to persistent cache bmpSize desync (bsc#1261226).
    - CVE-2026-33995: double-free vulnerability in `kerberos_AcceptSecurityContext` and       `kerberos_InitializeSecurityContextA` (bsc#1261227).

    Other updates and bugfixes:

    - Version 3.24.2:
      * [channels,video] fix wrong cast (#12511)
      * [codec,openh264] reject encoder ABI mismatch on runtime-loaded library (#12510)
      * [client,sdl] create a copy of rdpPointer (#12512)
      * [codec,video] properly pass intermediate format (#12518)
      * [utils, signal] lazily initialize Windows CRITICAL_SECTION to match POSIX static mutex behavior     (#12520) winpr:
        improve libunwind backtraces (#12530)
      * [server,shadow] remember selected caps (#12528)
      * Zero credential data before free in NLA and NTLM context (#12532)
      * [server,proxy] ignore missing client in input channel (#12536)
      * [server,proxy] ignore rdpdr messages (#12537)
      * [winpr,sspi] improve kerberos logging (#12538)
      * Codec fixes (#12542)

    - Version 3.24.1:
      * [warnings] fix various sign and cast warnings (#12480)
      * [client,x11] start with xfc->remote_app = TRUE; (#12491)
      * Sam file read regression fix (#12484)
      * [ncrypt,smartcardlogon] support ECC keys in PKCS#11 smartcard enumeration (#12490)
      * Fix: memory leak in rdp_client_establish_keys() (#12494)
      * Fix memory leak in freerdp_settings_int_buffer_copy() on error paths (libfreerdp/core/settings.c)     (#12486)
      * Code Cleanups (#12493)
      * Fix: memory leak in PCSC_SCardListReadersW() (#12495)
      * [channels,telemetry] use dynamic logging (#12496)
      * [channel,gfx] use generic plugin log (@12498, #12499)
      * [channels,audin] set error when audio_format_read fails (#12500)
      * [channels,video] unify error handling (#12502)
      * Fastpath fine grained lock (#12503)
      * [core,update] make the PlaySound callback non-mandatory (#12504)
      * Refinements: RPM build updates, FIPS improvements (#12506)

    - Version 3.24.0:
      * Completed the [[nodiscard]] marking of the API to warn about problematic
      * unchecked use of functions
      * Added full C23 support (default stays at C11) to allow new compilers
      * to do stricter checking
      * Improved X11 and SDL3 clients
      * Improved smartcard support
      * proxy now supports RFX graphics mode
      * Attribute nodiscard related chanes (#12325, #12360, #12395, #12406, #12421, #12426, #12177, #12403,     #12405, #12407,         #12409, #12408, #12412, #12413)
      * c23 related improvements (#12368, #12371, #12379, #12381, #12383, #12385, #12386, #12387, #12384)
      * Generic code cleanups (#12382, #12439, #12455, #12462, #12399, #12473) [core,utils] ignore NULL values     in         remove_rdpdr_type (#12372)
      * [codec,fdk] revert use of WinPR types (#12373)
      * [core,gateway] ignore incomplete rpc header (#12375, #12376)
      * [warnings] make function declaration names consistent (#12377)
      * [libfreerdp] Add new define for logon error info (#12380)
      * [client,x11] improve rails window locking (#12392)
      * Reload fix missing null checks (#12396)
      * Bounds checks (#12400)
      * [server,proxy] check for nullptr before using scard_call_context (#12404)
      * [uwac] fix rectangular glitch around surface damage regions (#12410)
      * Address various error handling inconsistencies (#12411)
      * [core,server] Improve WTS API locking (#12414)
      * Address some GCC compile issues (#12415, #12420)
      * Winpr atexit (#12416)
      * [winpr,smartcard] fix function pointer casts (#12422)
      * Xf timer fix (#12423)
      * [client,sdl] workaround for wlroots compositors (#12425)
      * [client,sdl] fix SdlWindow::query (#12378)
      * [winpr,smartcard] fix PCSC_ReleaseCardContext (#12427)
      * [client,x11] eliminate obsolete compile flags (#12428)
      * [client,common] skip sending input events when not connected (#12429)
      * Input connected checks (#12430)
      * Floatbar and display channel improvements (#12431)
      * [winpr,platform] fix WINPR_ATTR_NODISCARD definition (#12432)
      * [client] Fix writing of gatewayusagemethod to .rdp files (#12433)
      * Nodiscard finetune (#12435)
      * [core] fix missing gateway credential sync (#12436)
      * [client,sdl3] limit FREERDP_WLROOTS_HACK (#12441)
      * [core,settings] Allow FreeRDP_instance in setter (#12442)
      * [codec,h264] make log message trace (#12444)
      * X11 rails improve (#12440)
      * [codec,nsc] limit copy area in nsc_process_message (#12448)
      * Proxy support RFX and NSC settings (#12449)
      * [client,common] display a shortened help on parsing issues (#12450)
      * [winpr,smartcard] refine locking for pcsc layer (#12451)
      * [codec,swscale] allow runtime loading of swscale (#12452)
      * Swscale fallback (#12454)
      * Sdl multi scaling support (#12456)
      * [packaging,flatpak] update runtime and dependencies (#12457)
      * [codec,video] add doxygen version details (#12458)
      * [github,templates] update templates (#12460)
      * [client,sdl] allow FREERDP_WLROOTS_HACK for all sessions (#12461)
      * [warnings,nodiscard] add log messages for failures (#12463)
      * [gdi,gdi] ignore empty rectangles (#12467)
      * Smartcard fix smartcard-login, pass rdpContext for abort (#12466)
      * [winpr,smartcard] fix compiler warnings (#12469)
      * [winpr,timezone] fix search for transition dates (#12468)
      * [client,common] improve /p help (#12471)
      * Scard logging refactored (#12472)
      * [emu,scard] fix smartcard emulation (#12475)
      * Sdl null cursor (#12474)

    - Version 3.23.0:
      * Sdl cleanup (#12202)
      * [client,sdl] do not apply window offset (#12205)
      * [client,sdl] add SDL_Error to exceptions (#12214)
      * Rdp monitor log (#12215)
      * [winpr,smartcard] implement some attributes (#12213)
      * [client,windows] Fix return value checks for mouse event functions (#12279)
      * [channels,rdpecam] fix sws context checks (#12272)
      * [client,windows] Enhance error handling and context validation (#12264)
      * [client,windows] Add window handle validation in RDP_EVENT_TYPE_WINDOW_NEW (#12261)
      * [client,sdl] fix multimon/fullscreen on wayland (#12248)
      * Vendor by app (#12207)
      * [core,gateway] relax TSG parsing (#12283)
      * [winpr,smartcard] simplify PCSC_ReadDeviceSystemName (#12273)
      * [client,windows] Implement complete keyboard indicator synchronization (#12268)
      * Fixes more more more (#12286)
      * Use application details for names (#12285)
      * warning cleanups (#12289)
      * Warning cleanup (#12291)
      * [client,windows] Enhance memory safety with NULL checks and resource protection (#12271)
      * [client,x11] apply /size:xx% only once (#12293)
      * Freerdp config test (#12295)
      * [winpr,smartcard] fix returned attribute length (#12296)
      * [client,SDL3] Fix properly handle smart-sizing with fullscreen (#12298)
      * [core,test] fix use after free (#12299)
      * Sign warnings (#12300)
      * [cmake,compiler] disable -Wjump-misses-init (#12301)
      * [codec,color] fix input length checks (#12302)
      * [client,sdl] improve cursor updates, fix surface sizes (#12303)
      * Sdl fullscreen (#12217)
      * [client,sdl] fix move constructor of SdlWindow (#12305)
      * [utils,smartcard] check stream length on padding (#12306)
      * [android] Fix invert scrolling default value mismatch (#12309)
      * Clear fix bounds checks (#12310)
      * Winpr attr nodiscard fkt ptr (#12311)
      * [codec,planar] fix missing destination bounds checks (#12312)
      * [codec,clear] fix destination checks (#12315)
      * NSC Codec fixes (#12317)
      * Freerdp api nodiscard (#12313)
      * [allocations] fix growth of preallocated buffers (#12319)
      * Rdpdr simplify (#12320)
      * Resource fix (#12323)
      * [winpr,utils] ensure message queue capacity (#12322)
      * [server,shadow] fix return and parameter checks (#12330)
      * Shadow fixes (#12331)
      * [rdtk,nodiscard] mark rdtk API nodiscard (#12329)
      * [client,x11] fix XGetWindowProperty return handling (#12334)
      * Win32 signal (#12335)
      * [channel,usb] fix message parsing and creation (#12336)
      * [cmake] Define WINPR_DEFINE_ATTR_NODISCARD (#12338)
      * Proxy config fix (#12345)
      * [codec,progressive] refine progressive decoding (#12347)
      * [client,sdl] fix sdl_Pointer_New (#12350)
      * [core,gateway] parse [MS-TSGU] 2.2.10.5 HTTP_CHANNEL_RESPONSE_OPTIONAL (#12353)
      * X11 kbd sym (#12354)
      * Windows compile warning fixes (#12357,#12358,#12359)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20657-1 advisory.

    Update to version 3.24.2.

    Security issues fixed:

    - CVE-2026-25941: out-of-bounds read in the FreeRDP client RDPGFX channel (bsc#1258919).
    - CVE-2026-25942: buffer overflow of global array in `xf_rail_server_execute_result` (bsc#1258920).
    - CVE-2026-25952: heap use-after-free in `xf_SetWindowMinMaxInfo` (bsc#1258921).
    - CVE-2026-25953: heap use-after-free in `xf_AppUpdateWindowFromSurface` (bsc#1258923).
    - CVE-2026-25954: heap use-after-free in `xf_rail_server_local_move_size` (bsc#1258924).
    - CVE-2026-25955: heap use-after-free in `xf_AppUpdateWindowFromSurface` (bsc#1258973).
    - CVE-2026-25959: heap use-after-free in `xf_cliprdr_provide_data_` (bsc#1258976).
    - CVE-2026-25997: heap use-after-free in `xf_clipboard_format_equal` (bsc#1258977).
    - CVE-2026-26271: buffer overread in FreeRDP icon processing (bsc#1258979).
    - CVE-2026-26955: out-of-bounds write in FreeRDP clients using the GDI surface pipeline (bsc#1258982).
    - CVE-2026-26965: out-of-bounds write in FreeRDP client RLE planar decode path (bsc#1258985).
    - CVE-2026-29774: heap buffer overflow in the FreeRDP client's AVC420/AVC444 YUV-to-RGB conversion path     (bsc#1259689).
    - CVE-2026-29775: out-of-bounds access in the FreeRDP client bitmap cache subsystem (bsc#1259684).
    - CVE-2026-29776: integer underflow in `update_read_cache_bitmap_order` (bsc#1259692).
    - CVE-2026-31806: heap buffer overflow in `nsc_process_message` (bsc#1259653).
    - CVE-2026-31883: heap buffer overwrite due to a `size_t` underflow in the IMA-ADPCM and MS-ADPCM audio     decoders       (bsc#1259679).
    - CVE-2026-31884: division by zero in MS-ADPCM and IMA-ADPCM decoders (bsc#1259680).
    - CVE-2026-31885: out-of-bounds read in MS-ADPCM and IMA-ADPCM decoders (bsc#1259686).
    - CVE-2026-31897: out-of-bounds read in `freerdp_bitmap_decompress_planar` (bsc#1259693).
    - CVE-2026-33952: client-side crash due to `WINPR_ASSERT()` failure in     `rts_read_auth_verifier_no_checks()`       (bsc#1261196).
    - CVE-2026-33977: client-side crash due to `WINPR_ASSERT()` failure in IMA ADPCM audio decoder     (bsc#1261198).
    - CVE-2026-33982: heap buffer overread in in `winpr_aligned_offset_recalloc` (bsc#1261222).
    - CVE-2026-33983: undefined behavior and resource exhaustion via 80 billion iteration loop in       `progressive_decompress_tile_upgrade` (bsc#1261200).
    - CVE-2026-33984: heap buffer overflow in ClearCodec `resize_vbar_entry` (bsc#1261211).
    - CVE-2026-33985: heap out-of-bounds read in `clear_decompress_glyph_data` (bsc#1261217).
    - CVE-2026-33986: heap out-of-bounds write due to H.264 YUV buffer dimension desync (bsc#1261223).
    - CVE-2026-33987: heap out-of-bounds write due to persistent cache bmpSize desync (bsc#1261226).
    - CVE-2026-33995: double-free vulnerability in `kerberos_AcceptSecurityContext` and       `kerberos_InitializeSecurityContextA` (bsc#1261227).

    Other updates and bugfixes:

    - Version 3.24.2:
      * [channels,video] fix wrong cast (#12511)
      * [codec,openh264] reject encoder ABI mismatch on runtime-loaded library (#12510)
      * [client,sdl] create a copy of rdpPointer (#12512)
      * [codec,video] properly pass intermediate format (#12518)
      * [utils, signal] lazily initialize Windows CRITICAL_SECTION to match POSIX static mutex behavior     (#12520) winpr:
        improve libunwind backtraces (#12530)
      * [server,shadow] remember selected caps (#12528)
      * Zero credential data before free in NLA and NTLM context (#12532)
      * [server,proxy] ignore missing client in input channel (#12536)
      * [server,proxy] ignore rdpdr messages (#12537)
      * [winpr,sspi] improve kerberos logging (#12538)
      * Codec fixes (#12542)

    - Version 3.24.1:
      * [warnings] fix various sign and cast warnings (#12480)
      * [client,x11] start with xfc->remote_app = TRUE; (#12491)
      * Sam file read regression fix (#12484)
      * [ncrypt,smartcardlogon] support ECC keys in PKCS#11 smartcard enumeration (#12490)
      * Fix: memory leak in rdp_client_establish_keys() (#12494)
      * Fix memory leak in freerdp_settings_int_buffer_copy() on error paths (libfreerdp/core/settings.c)     (#12486)
      * Code Cleanups (#12493)
      * Fix: memory leak in PCSC_SCardListReadersW() (#12495)
      * [channels,telemetry] use dynamic logging (#12496)
      * [channel,gfx] use generic plugin log (@12498, #12499)
      * [channels,audin] set error when audio_format_read fails (#12500)
      * [channels,video] unify error handling (#12502)
      * Fastpath fine grained lock (#12503)
      * [core,update] make the PlaySound callback non-mandatory (#12504)
      * Refinements: RPM build updates, FIPS improvements (#12506)

    - Version 3.24.0:
      * Completed the [[nodiscard]] marking of the API to warn about problematic
      * unchecked use of functions
      * Added full C23 support (default stays at C11) to allow new compilers
      * to do stricter checking
      * Improved X11 and SDL3 clients
      * Improved smartcard support
      * proxy now supports RFX graphics mode
      * Attribute nodiscard related chanes (#12325, #12360, #12395, #12406, #12421, #12426, #12177, #12403,     #12405, #12407,         #12409, #12408, #12412, #12413)
      * c23 related improvements (#12368, #12371, #12379, #12381, #12383, #12385, #12386, #12387, #12384)
      * Generic code cleanups (#12382, #12439, #12455, #12462, #12399, #12473) [core,utils] ignore NULL values     in         remove_rdpdr_type (#12372)
      * [codec,fdk] revert use of WinPR types (#12373)
      * [core,gateway] ignore incomplete rpc header (#12375, #12376)
      * [warnings] make function declaration names consistent (#12377)
      * [libfreerdp] Add new define for logon error info (#12380)
      * [client,x11] improve rails window locking (#12392)
      * Reload fix missing null checks (#12396)
      * Bounds checks (#12400)
      * [server,proxy] check for nullptr before using scard_call_context (#12404)
      * [uwac] fix rectangular glitch around surface damage regions (#12410)
      * Address various error handling inconsistencies (#12411)
      * [core,server] Improve WTS API locking (#12414)
      * Address some GCC compile issues (#12415, #12420)
      * Winpr atexit (#12416)
      * [winpr,smartcard] fix function pointer casts (#12422)
      * Xf timer fix (#12423)
      * [client,sdl] workaround for wlroots compositors (#12425)
      * [client,sdl] fix SdlWindow::query (#12378)
      * [winpr,smartcard] fix PCSC_ReleaseCardContext (#12427)
      * [client,x11] eliminate obsolete compile flags (#12428)
      * [client,common] skip sending input events when not connected (#12429)
      * Input connected checks (#12430)
      * Floatbar and display channel improvements (#12431)
      * [winpr,platform] fix WINPR_ATTR_NODISCARD definition (#12432)
      * [client] Fix writing of gatewayusagemethod to .rdp files (#12433)
      * Nodiscard finetune (#12435)
      * [core] fix missing gateway credential sync (#12436)
      * [client,sdl3] limit FREERDP_WLROOTS_HACK (#12441)
      * [core,settings] Allow FreeRDP_instance in setter (#12442)
      * [codec,h264] make log message trace (#12444)
      * X11 rails improve (#12440)
      * [codec,nsc] limit copy area in nsc_process_message (#12448)
      * Proxy support RFX and NSC settings (#12449)
      * [client,common] display a shortened help on parsing issues (#12450)
      * [winpr,smartcard] refine locking for pcsc layer (#12451)
      * [codec,swscale] allow runtime loading of swscale (#12452)
      * Swscale fallback (#12454)
      * Sdl multi scaling support (#12456)
      * [packaging,flatpak] update runtime and dependencies (#12457)
      * [codec,video] add doxygen version details (#12458)
      * [github,templates] update templates (#12460)
      * [client,sdl] allow FREERDP_WLROOTS_HACK for all sessions (#12461)
      * [warnings,nodiscard] add log messages for failures (#12463)
      * [gdi,gdi] ignore empty rectangles (#12467)
      * Smartcard fix smartcard-login, pass rdpContext for abort (#12466)
      * [winpr,smartcard] fix compiler warnings (#12469)
      * [winpr,timezone] fix search for transition dates (#12468)
      * [client,common] improve /p help (#12471)
      * Scard logging refactored (#12472)
      * [emu,scard] fix smartcard emulation (#12475)
      * Sdl null cursor (#12474)

    - Version 3.23.0:
      * Sdl cleanup (#12202)
      * [client,sdl] do not apply window offset (#12205)
      * [client,sdl] add SDL_Error to exceptions (#12214)
      * Rdp monitor log (#12215)
      * [winpr,smartcard] implement some attributes (#12213)
      * [client,windows] Fix return value checks for mouse event functions (#12279)
      * [channels,rdpecam] fix sws context checks (#12272)
      * [client,windows] Enhance error handling and context validation (#12264)
      * [client,windows] Add window handle validation in RDP_EVENT_TYPE_WINDOW_NEW (#12261)
      * [client,sdl] fix multimon/fullscreen on wayland (#12248)
      * Vendor by app (#12207)
      * [core,gateway] relax TSG parsing (#12283)
      * [winpr,smartcard] simplify PCSC_ReadDeviceSystemName (#12273)
      * [client,windows] Implement complete keyboard indicator synchronization (#12268)
      * Fixes more more more (#12286)
      * Use application details for names (#12285)
      * warning cleanups (#12289)
      * Warning cleanup (#12291)
      * [client,windows] Enhance memory safety with NULL checks and resource protection (#12271)
      * [client,x11] apply /size:xx% only once (#12293)
      * Freerdp config test (#12295)
      * [winpr,smartcard] fix returned attribute length (#12296)
      * [client,SDL3] Fix properly handle smart-sizing with fullscreen (#12298)
      * [core,test] fix use after free (#12299)
      * Sign warnings (#12300)
      * [cmake,compiler] disable -Wjump-misses-init (#12301)
      * [codec,color] fix input length checks (#12302)
      * [client,sdl] improve cursor updates, fix surface sizes (#12303)
      * Sdl fullscreen (#12217)
      * [client,sdl] fix move constructor of SdlWindow (#12305)
      * [utils,smartcard] check stream length on padding (#12306)
      * [android] Fix invert scrolling default value mismatch (#12309)
      * Clear fix bounds checks (#12310)
      * Winpr attr nodiscard fkt ptr (#12311)
      * [codec,planar] fix missing destination bounds checks (#12312)
      * [codec,clear] fix destination checks (#12315)
      * NSC Codec fixes (#12317)
      * Freerdp api nodiscard (#12313)
      * [allocations] fix growth of preallocated buffers (#12319)
      * Rdpdr simplify (#12320)
      * Resource fix (#12323)
      * [winpr,utils] ensure message queue capacity (#12322)
      * [server,shadow] fix return and parameter checks (#12330)
      * Shadow fixes (#12331)
      * [rdtk,nodiscard] mark rdtk API nodiscard (#12329)
      * [client,x11] fix XGetWindowProperty return handling (#12334)
      * Win32 signal (#12335)
      * [channel,usb] fix message parsing and creation (#12336)
      * [cmake] Define WINPR_DEFINE_ATTR_NODISCARD (#12338)
      * Proxy config fix (#12345)
      * [codec,progressive] refine progressive decoding (#12347)
      * [client,sdl] fix sdl_Pointer_New (#12350)
      * [core,gateway] parse [MS-TSGU] 2.2.10.5 HTTP_CHANNEL_RESPONSE_OPTIONAL (#12353)
      * X11 kbd sym (#12354)
      * Windows compile warning fixes (#12357,#12358,#12359)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1549 advisory.

    DoS via WINPR_ASSERT in rts_read_auth_verifier_no_checks

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4v4p-9v5x-hc93 (CVE-2026-33952)

    DoS via WINPR_ASSERT in IMA ADPCM audio decoder (dsp.c:331)

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8f2g-3q27-6xm5 (CVE-2026-33977)

    Persistent Cache Allocator Mismatch - Heap OOB Read

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jm9-2925-g4v2 (CVE-2026-33982)

    Progressive Codec Quant BYTE Underflow - UB + CPU DoS

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478 (CVE-2026-33983)

    ClearCodec resize_vbar_entry() Heap OOB Write

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6 (CVE-2026-33984)

    ClearCodec Glyph Cache Count Desync - Heap OOB Read

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-x6gr-8p7h-5h85 (CVE-2026-33985)

    H.264 YUV Buffer Dimension Desync - Heap OOB Write

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h6qw-wxvm-hf97 (CVE-2026-33986)

    Persistent Cache bmpSize Desync - Heap OOB Write

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-ff8h-p5vc-wcwc (CVE-2026-33987)

    double free in kerberos_AcceptSecurityContext and kerberos_IntitalizeSecurityContextA

    NOTE: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mv25-f4p2-5mxx (CVE-2026-33995)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-07418a381f advisory.

    Update to 3.24.2

    It fixes CVE-2026-33952, CVE-2026-33977, CVE-2026-33982, CVE-2026-33983,     CVE-2026-33984, CVE-2026-33985, CVE-2026-33986, CVE-2026-33987 and     CVE-2026-33995.

    ----

    Update to 3.24.0 (CVE-2026-29774, CVE-2026-29775, CVE-2026-29776, CVE-2026-31806, CVE-2026-31883,     CVE-2026-31884, CVE-2026-31885, CVE-2026-31897)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-f6fe509803 advisory.

    Update to 3.24.2

    It fixes CVE-2026-33952, CVE-2026-33977, CVE-2026-33982, CVE-2026-33983,     CVE-2026-33984, CVE-2026-33985, CVE-2026-33986, CVE-2026-33987 and     CVE-2026-33995.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-36ea367760 advisory.

    Update to 3.24.2

    It fixes CVE-2026-33952, CVE-2026-33977, CVE-2026-33982, CVE-2026-33983,     CVE-2026-33984, CVE-2026-33985, CVE-2026-33986, CVE-2026-33987 and     CVE-2026-33995.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, there is a heap-
    buffer-overflow READ vulnerability at 24 bytes before the allocation, in winpr_aligned_offset_recalloc().
    This issue has been patched in version 3.24.2. (CVE-2026-33982)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated
    auth_length field read from the network triggers a WINPR_ASSERT() failure in
    rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway
    to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using
    RPC-over-HTTP gateway transport. The assertion is active in default release builds
    (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2. (CVE-2026-33952)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP
    server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step
    index value (>= 89). The unvalidated step index is read directly from the network and used to index into a
    89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any
    FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue
    has been patched in version 3.24.2. (CVE-2026-33977)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2,
    progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only
    emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing
    undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched
    in version 3.24.2. (CVE-2026-33983)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a double-free     vulnerability in kerberos_AcceptSecurityContext() and kerberos_InitializeSecurityContextA() (WinPR,     winpr/libwinpr/sspi/Kerberos/kerberos.c) can cause a crash in any FreeRDP clients on systems where     Kerberos and/or Kerberos U2U is configured (Samba AD member, or krb5 for NFS). The crash is triggered     during NLA connection teardown and requires a failed authentication attempt. This issue has been patched     in version 3.24.2. (CVE-2026-33995)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
334787	SUSE SLED15: freerdp / freerdp-devel / freerdp-proxy / freerdp-proxy-plugins / etc (SUSE-SU-2026:3562-1)	Nessus	SuSE Local Security Checks	Local	high
323073	SUSE SLES16: freerdp / freerdp-devel / freerdp-proxy / freerdp-proxy-plugins / etc (SUSE-SU-2026:22194-1)	Nessus	SuSE Local Security Checks	Local	high
312138	SUSE SLES16 Security Update : freerdp (SUSE-SU-2026:21436-1)	Nessus	SuSE Local Security Checks	Local	critical
312116	openSUSE 16 Security Update : freerdp (openSUSE-SU-2026:20657-1)	Nessus	SuSE Local Security Checks	Local	critical
306209	Amazon Linux 2023 : freerdp, freerdp-devel, freerdp-libs (ALAS2023-2026-1549)	Nessus	Amazon Linux Local Security Checks	Local	medium
304936	Fedora 42 : freerdp (2026-07418a381f)	Nessus	Fedora Local Security Checks	Local	critical
304442	Fedora 43 : freerdp (2026-f6fe509803)	Nessus	Fedora Local Security Checks	Local	medium
304350	Fedora 44 : freerdp (2026-36ea367760)	Nessus	Fedora Local Security Checks	Local	medium
439410	Alpine: freerdp: security update to 3.24.2-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	medium
439410	Alpine: freerdp: security update to 3.24.2-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	medium
303849	Linux Distros Unpatched Vulnerability : CVE-2026-33995	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-33995

medium

Tenable Plugins

high

high

critical

critical

medium

critical

medium

medium

medium

medium

medium