FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, sdl_Pointer_New frees data on failure, then pointer_free calls sdl_Pointer_Free and frees it again, triggering ASan UAF. This vulnerability is fixed in 3.22.0.

The CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS7:CLSA-2026:1771857838 advisory.

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer     dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP     proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability     is fixed in 3.22.0. (CVE-2026-23948)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, video_timer can send     client notifications after the control channel is closed, dereferencing a freed callback and triggering a     use after free. This vulnerability is fixed in 3.22.0. (CVE-2026-24491)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, AUDIN format     renegotiation frees the active format list while the capture thread continues using audin->format, leading     to a use after free in audio_format_compatible. This vulnerability is fixed in 3.22.0. (CVE-2026-24676)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, sdl_Pointer_New frees     data on failure, then pointer_free calls sdl_Pointer_Free and frees it again, triggering ASan UAF. This     vulnerability is fixed in 3.22.0. (CVE-2026-24680)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, aAsynchronous bulk     transfer completions can use a freed channel callback after URBDRC channel close, leading to a use after     free in urb_write_completion. This vulnerability is fixed in 3.22.0. (CVE-2026-24681)

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-2026:20339-1 advisory.

    Update to version 3.22.0 (jsc#PED-15526):

      - Major bugfix release:

        * Complete overhaul of SDL client
        * Introduction of new WINPR_ATTR_NODISCARD macro wrapping compiler or C language version specific     [[nodiscard]] attributes
        * Addition of WINPR_ATTR_NODISCARD to (some) public API functions so usage errors are producing     warnings now
        * Add some more stringify functions for logging
        * We've received CVE reports, check           https://github.com/FreeRDP/FreeRDP/security/advisories for more details!           @Keryer reported an issue affecting client and proxy:
          * CVE-2026-23948           @ehdgks0627 did some more fuzzying and found quite a number of client side bugs.
          * CVE-2026-24682
          * CVE-2026-24683
          * CVE-2026-24676
          * CVE-2026-24677
          * CVE-2026-24678
          * CVE-2026-24684
          * CVE-2026-24679
          * CVE-2026-24681
          * CVE-2026-24675
          * CVE-2026-24491
          * CVE-2026-24680

    - Changes from version 3.21.0

      * [core,info] fix missing NULL check (#12157)
      * [gateway,tsg] fix TSG_PACKET_RESPONSE parsing (#12161)
      * Allow querying auth identity with kerberos when running as a server (#12162)
      * Sspi krb heimdal (#12163)
      * Tsg fix idleTimeout parsing (#12167)
      * [channels,smartcard] revert 649f7de (#12166)
      * [crypto] deprecate er and der modules (#12170)
      * [channels,rdpei] lock full update, not only parts (#12175)
      * [winpr,platform] add WINPR_ATTR_NODISCARD macro (#12178)
      * Wlog cleanup (#12179)
      * new stringify functions & touch API defines (#12180)
      * Add support for querying SECPKG_ATTR_PACKAGE_INFO to NTLM and Kerberos (#12171)
      * [channels,video] measure times in ns (#12184)
      * [utils] Nodiscard (#12187)
      * Error handling fixes (#12186)
      * [channels,drdynvc] check pointer before reset (#12189)
      * Winpr api def (#12190)
      * [winpr,platform] drop C23 [[nodiscard]] (#12192)
      * [gdi] add additional checks for a valid rdpGdi (#12194)
      * Sdl3 high dpiv2 (#12173)
      * peer: Disconnect if Logon() returned FALSE (#12196)
      * [channels,rdpecam] fix PROPERTY_DESCRIPTION parsing (#12197)
      * [channel,rdpsnd] only clean up thread before free (#12199)
      * [channels,rdpei] add RDPINPUT_CONTACT_FLAG_UP (#12195)

    - Update to version 3.21.0:

      - Bugfix release with a few new API functions addressing shortcomings with         regard to input data validation.
        Thanks to @ehdgks0627 we have fixed the following additional (medium)         client side vulnerabilities:

        * CVE-2026-23530
        * CVE-2026-23531
        * CVE-2026-23532
        * CVE-2026-23533
        * CVE-2026-23534
        * CVE-2026-23732
        * CVE-2026-23883
        * CVE-2026-23884

    - Changes from version 3.20.2

      * [client,sdl] fix monitor resolution (#12142)
      * [codec,progressive] fix progressive_rfx_upgrade_block (#12143)
      * Krb cache fix (#12145)
      * Rdpdr improved checks (#12141)
      * Codec advanced length checks (#12146)
      * Glyph fix length checks (#12151)
      * Wlog printf format string checks (#12150)
      * [warnings,format] fix format string warnings (#12152)
      * Double free fixes (#12153)
      * [clang-tidy] clean up code warnings (#12154)

    - Update to version 3.20.2:

      - Patch release fixing a regression with gateway connections         introduced with 3.20.1         ## What's Changed
        * Warnings and missing enumeration types (#12137)

    - Changes from version 3.20.1:

      - New years cleanup release. Fixes some issues reported and does         a cleaning sweep to bring down warnings.
        Thanks to @ehdgks0627 doing some code review/testing we've         uncovered the following (medium) vulnerabilities:

        * CVE-2026-22851
        * CVE-2026-22852
        * CVE-2026-22853
        * CVE-2026-22854
        * CVE-2026-22855
        * CVE-2026-22856
        * CVE-2026-22857
        * CVE-2026-22858
        * CVE-2026-22859

      - These affect FreeRDP based clients only, with the exception of         CVE-2026-22858 also affecting FreeRDP proxy. FreeRDP based         servers are not affected.

    - Update to version 3.20.0:

      * Mingw fixes (#12070)
      * [crypto,certificate_data] add some hostname sanitation
      * [client,common]: Fix loading of rdpsnd channel
      * [client,sdl] set touch and pen hints

    - Changes from version 3.19.1:

      * [core,transport] improve SSL error logging
      * [utils,helpers] fix freerdp_settings_get_legacy_config_path
      * From stdin and sdl-creds improve
      * [crypto,certificate] sanitize hostnames
      * [channels,drdynvc] propagate error in dynamic channel
      * [CMake] make Mbed-TLS and LibreSSL experimental
      * Json fix
      * rdpecam: send sample only if it's available
      * [channels,rdpecam] allow MJPEG frame skip and direct passthrough
      * [winpr,utils] explicit NULL checks in jansson WINPR_JSON_ParseWithLength

    - Changes from version 3.19.0:

      * [client,common] fix retry counter
      * [cmake] fix aarch64 neon detection
      * Fix response body existence check when using RDP Gateway
      * fix line clipping issue
      * Clip coord fix
      * [core,input] Add debug log to keyboard state sync
      * Update command line usage for gateway option
      * [codec,ffmpeg] 8.0 dropped AV_PROFILE_AAC_MAIN
      * [channels,audin] fix pulse memory leak
      * [channels,drive] Small performance improvements in drive channel
      * [winpr,utils] fix command line error logging
      * [common,test] Adjust AVC and H264 expectations
      * drdynvc: implement compressed packet
      * [channels,rdpecam] improve log messages
      * Fix remote credential guard channel loading
      * Fix inverted ifdef
      * [core,nego] disable all enabled modes except the one requested
      * rdpear: handle basic NTLM commands and fix server-side
      * [smartcardlogon] Fix off-by-one error in `smartcard_hw_enumerateCerts`
      * rdpecam: fix camera sample grabbing

    - Update to version 3.18.0:

      - Fix a regression reading passwords from stdin
      - Fix a timer regression (?s instead of ms)
      - Improved multitouch support
      - Fix a bug with PLANAR codec (used with /bpp:32 or sometimes with /gfx)
      - Better error handling for ARM transport (Entra)
      - Fix audio encoder lag (microphone/AAC) with FFMPEG
      - Support for janssen JSON library

    - Update to version 3.17.2:

      - Minor improvements and bugfix release.
      - Most notably resource usage (file handles) has been greatly reduced and         static build pkg-config have been fixed.
        For users of xfreerdp RAILS/RemoteApp mode the switch to DesktopSession         mode has been fixed (working UAC screen)

    - Changes from version 3.17.1

      - Minor improvements and bugfix release.
        * most notably a memory leak was addressed
        * fixed header files missing C++ guards
        * xfreerdp as well as the SDL clients now support a system wide configuration file
        * Heimdal kerberos support was improved
        * builds with [MS-RDPEAR] now properly abort at configure if Heimdal is used           (this configuration was never supported, so ensure nobody compiles it that way)

    - Enable openh264 support, we can build against the noopenh264 stub

    - Update to 3.17.0:

      * [client,sdl2] fix build with webview (#11685)
      * [core,nla] use wcslen for password length (#11687)
      * Clear channel error prior to call channel init event proc (#11688)
      * Warn args (#11689)
      * [client,common] fix -mouse-motion (#11690)
      * [core,proxy] fix IPv4 and IPv6 length (#11692)
      * Regression fix2 (#11696)
      * Log fixes (#11693)
      * [common,settings] fix int casts (#11699)
      * [core,connection] fix log level of several messages (#11697)
      * [client,sdl] print current video driver (#11701)
      * [crypto,tls] print big warning for /cert:ignore (#11704)
      * [client,desktop] fix StartupWMClass setting (#11708)
      * [cmake] unify version creation (#11711)
      * [common,settings] force reallocation on caps copy (#11715)
      * [manpages] Add example of keyboard remapping (#11718)
      * Some fixes in Negotiate and NLA (#11722)
      * [client,x11] fix clipboard issues (#11724)
      * kerberos: do various tries for TGT retrieval in u2u (#11723)
      * Cmdline escape strings (#11735)
      * [winpr,utils] do not log command line arguments (#11736)
      * [api,doc] Add stylesheed for doxygen (#11738)
      * [core,proxy] fix BIO read methods (#11739)
      * [client,common] fix sso_mib_get_access_token return value in error case (#11741)
      * [crypto,tls] do not use context->settings->instance (#11749)
      * winpr: re-introduce the credentials module (#11734)
      * [winpr,timezone] ensure thread-safe initialization (#11754)
      * core/redirection: Ensure stream has enough space for the certificate (#11762)
      * [client,common] do not log success (#11766)
      * Clean up bugs exposed on systems with high core counts (#11761)
      * [cmake] add installWithRPATH (#11747)
      * [clang-tidy] fix various warnings (#11769)
      * Wlog improve type checks (#11774)
      * [client,common] fix tenantid command line parsing (#11779)
      * Proxy module static and shared linking support (#11768)
      * LoadLibrary Null fix (#11786)
      * [client,common] add freerdp_client_populate_settings_from_rdp_file_un (#11780)
      * Fullchain support (#11787)
      * [client,x11] ignore floatbar events (#11771)
      * [winpr,credentials] prefer utf-8 over utf-16-LE #11790
      * [proxy,modules] ignore bitmap-filter skip remaining #11789

    - Update to 3.16.0:
      * Lots of improvements for the SDL3 client
      * Various X11 client improvements
      * Add a timer implementation
      * Various AAD/Azure/Entra improvements
      * YUV420 primitives fixes
    - Update to 3.15.0:
      * [client,sdl] fix crash on suppress output
      * [channels,remdesk] fix possible memory leak
      * [client,x11] map exit code success
      * Hidef rail checks and deprecation fixe
      * Standard rdp security network issues
      * [core,rdp] fix check for SEC_FLAGSHI_VALID
      * [core,caps] fix rdp_apply_order_capability_set
      * [core,proxy] align no_proxy to curl
      * [core,gateway] fix string reading for TSG
      * [client,sdl] refactor display update

    - Update to version 3.14.0:

      - Bugfix and cleanup release. Due to some new API functions the         minor version has been increased.

    - Changes from version 3.13.0:

      - Friends of old hardware rejoice, serial port redirection got an         update (not kidding you)
      - Android builds have been updated to be usable again
      - Mingw builds now periodically do a shared and static build
      - Fixed some bugs and regressions along the way and improved test         coverage as well

    - Changes from version 3.12.0:

      - Multimonitor backward compatibility fixes
      - Smartcard compatibility
      - Improve the [MS-RDPECAM] support
      - Improve smartcard redirection support       + Refactor SSE optimizations: Split headers, unify load/store,         require SSE3 for all optimized functions       + Refactors the CMake build to better support configuration based         builders       + Fix a few regressions from last release (USB redirection and         graphical glitches)

    - Changes from version 3.11.0:

      + A new release with bugfixes and code cleanups as well as a few         nifty little features

    - CVE-2024-22211: In affected versions an integer overflow in         `freerdp_bitmap_planar_context_reset` leads to heap-buffer         overflow. (bsc#1219049)

    - CVE-2024-32658: Fixedout-of-bounds read in Interleaved RLE Bitmap Codec in FreeRDP based clients     (bsc#1223353)

    - Multiple CVE fixes       + CVE-2024-32659: Fixed out-of-bounds read if `((nWidth == 0) and (nHeight == 0))`(bsc#1223346)       + CVE-2024-32660: Fixed client crash via invalid huge allocation size (bsc#1223347)       + CVE-2024-32661: Fixed client NULL pointer dereference (bsc#1223348)

    - Multiple CVE fixes:
        * bsc#1223293, CVE-2024-32039
        * bsc#1223294, CVE-2024-32040
        * bsc#1223295, CVE-2024-32041
        * bsc#1223296, CVE-2024-32458
        * bsc#1223297, CVE-2024-32459
        * bsc#1223298, CVE-2024-32460

      * Fix CVE-2023-40574 - bsc#1214869: Out-Of-Bounds Write in general_YUV444ToRGB_8u_P3AC4R_BGRX
      * Fix CVE-2023-40575 - bsc#1214870: Out-Of-Bounds Read in general_YUV444ToRGB_8u_P3AC4R_BGRX
      * Fix CVE-2023-40576 - bsc#1214871: Out-Of-Bounds Read in RleDecompress

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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0763-1 advisory.

    - CVE-2026-24491: heap-use-after-free in video_timer (bsc#1257981).
    - CVE-2026-24675: heap-use-after-free in urb_select_interface (bsc#1257982).
    - CVE-2026-24676: heap-use-after-free in audio_format_compatible (bsc#1257983).
    - CVE-2026-24677: heap-buffer-overflow in ecam_encoder_compress_h264 (bsc#1257984).
    - CVE-2026-24678: heap-use-after-free in cam_v4l_stream_capture_thread (bsc#1257985).
    - CVE-2026-24679: heap-buffer-overflow in urb_select_interface (bsc#1257986).
    - CVE-2026-24680: heap-use-after-free in update_pointer_new(SDL) (bsc#1257987).
    - CVE-2026-24681: heap-use-after-free in urb_bulk_transfer_cb (bsc#1257988).
    - CVE-2026-24682: heap-buffer-overflow in audio_formats_free (bsc#1257989).
    - CVE-2026-24683: heap-use-after-free in ainput_send_input_event (bsc#1257990).
    - CVE-2026-24684: heap-use-after-free in play_thread (bsc#1257991).

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 ALAS2023-2026-1454 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer     dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP     proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability     is fixed in 3.22.0. (CVE-2026-23948)

    Client side issue with FreeRDP (CVE-2026-24491)

    Client side issue with FreeRDP (CVE-2026-24675)

    Client side issue with FreeRDP (CVE-2026-24676)

    Client side issue with FreeRDP (CVE-2026-24677)

    Client side issue with FreeRDP (CVE-2026-24678)

    Client side issue with FreeRDP (CVE-2026-24679)

    Client side issue with FreeRDP (CVE-2026-24680)

    Client side issue with FreeRDP (CVE-2026-24681)

    Client side issue with FreeRDP (CVE-2026-24682)

    Client side issue with FreeRDP (CVE-2026-24683)

    Client side issue with FreeRDP (CVE-2026-24684)

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-fa67f40526 advisory.

    Update to 3.22.0


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 Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8042-1 advisory.

    It was discovered that FreeRDP incorrectly handled memory under certain circumstances, which could lead to     a NULL pointer dereference. An attacker could possibly use this issue to cause a denial of service.
    (CVE-2026-23948)

    It was discovered that FreeRDP did not correctly validate the size of certain variables, which could cause     a buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute     arbitrary code. This issue only affected FreeRDP3 in Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-24491)

    It was discovered that FreeRDP did not correctly validate the size of certain variables, which could cause     a buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute     arbitrary code. (CVE-2026-24675, CVE-2026-24679, CVE-2026-24682)

    It was discovered that FreeRDP had a use after free vulnerability under certain circumstances. An attacker     could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2026-24676,     CVE-2026-24681)

    It was discovered that FreeRDP did not correctly validate the size of certain variables, which could cause     a buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute     arbitrary code. This issue only affected Ubuntu 25.10. (CVE-2026-24677)

    It was discovered that FreeRDP had a use after free vulnerability under certain circumstances. An attacker     could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected     Ubuntu 25.10. (CVE-2026-24678)

    It was discovered that FreeRDP had a use after free vulnerability under certain circumstances. An attacker     could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected     FreeRDP3 in Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-24680)

    It was discovered that FreeRDP had a use after free vulnerability under certain circumstances. An attacker     could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected     Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-24683, CVE-2026-24684)

Tenable has extracted the preceding description block directly from the Ubuntu 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 3.21.0, offscreen bitmap
    deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A
    malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap
    corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version
    3.21.0 contains a patch for the issue. (CVE-2026-23884)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between
    the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free.
    Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during
    RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1. (CVE-2026-22851)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server
    can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format
    lists. audin_process_formats reuses callback->formats_count across multiple MSG_SNDIN_FORMATS PDUs and
    writes past the newly allocated formats array, causing memory corruption and a crash. This vulnerability
    is fixed in 3.20.1. (CVE-2026-22852)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array
    reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer
    allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed
    in 3.20.1. (CVE-2026-22853)

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap-buffer-overflow
    occurs in drive read when a server-controlled read length is used to read file data into an IRP output
    stream buffer without a hard upper bound, allowing an oversized read to overwrite heap memory. This
    vulnerability is fixed in 3.20.1. (CVE-2026-22854)

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 3.22.0, sdl_Pointer_New frees     data on failure, then pointer_free calls sdl_Pointer_Free and frees it again, triggering ASan UAF. This     vulnerability is fixed in 3.22.0. (CVE-2026-24680)

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

ID	Name	Product	Family	Type	Severity
352016	CentOS Linux 7 [TuxCare] Security Update: freerdp / freerdp-devel / freerdp-libs / libwinpr / libwinpr-devel Multiple Vulnerabilities (CENTOS7:CLSA-2026:1771857838)	Nessus	CentOS Local Security Checks	Local	high
302093	openSUSE 16 Security Update : freerdp (openSUSE-SU-2026:20339-1)	Nessus	SuSE Local Security Checks	Local	high
301380	SUSE SLED15 / SLES15 Security Update : freerdp (SUSE-SU-2026:0763-1)	Nessus	SuSE Local Security Checks	Local	high
301354	Amazon Linux 2023 : freerdp, freerdp-devel, freerdp-libs (ALAS2023-2026-1454)	Nessus	Amazon Linux Local Security Checks	Local	high
299425	Fedora 42 : freerdp (2026-fa67f40526)	Nessus	Fedora Local Security Checks	Local	high
299346	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : FreeRDP vulnerabilities (USN-8042-1)	Nessus	Ubuntu Local Security Checks	Local	high
437642	Alpine: multiple freerdp packages: security update to 3.22.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
437642	Alpine: multiple freerdp packages: security update to 3.22.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
297179	Linux Distros Unpatched Vulnerability : CVE-2026-24680	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-24680

high

Tenable Plugins

high

high

high

high

high

high

high

high

high