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

  - FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface     callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so     HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can     exploit this by creating surfaceId 0xFFFF, closing the RDPGFX channel, sending repeated DELETESURFACE     PDUs, and then sending ENDFRAME or RESETGRAPHICS. (CVE-2026-121958)

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

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:98598 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

    Security Fix(es):

    * FreeRDP: freerdp-proxy: FreeRDP: Information disclosure via uninitialized heap memory in Save Session     Info PDU (CVE-2026-85089)

    * FreeRDP: FreeRDP: Arbitrary code execution via oversized channel messages in SHOW_PROTOCOL     (CVE-2026-91948)

    * FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits command (CVE-2026-91954)

    * FreeRDP: FreeRDP: Remote code execution via heap buffer overflow in Server Redirection PDU     (CVE-2026-91964)

    * FreeRDP: FreeRDP: Information Disclosure via RDPGFX ResetGraphics PDU (CVE-2026-91946)

    * freerdp: FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass (CVE-2026-91949)

    * FreeRDP: FreeRDP: Denial of Service via out-of-bounds read in URBDRC channel (CVE-2026-91956)

    * FreeRDP: FreeRDP: Denial of Service via out-of-bounds write in urbdrc client channel (CVE-2026-91951)

    * FreeRDP: FreeRDP: Remote code execution via uninitialized heap memory disclosure (CVE-2026-91963)

    * FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC parser leads to memory corruption     (CVE-2026-91947)

    * FreeRDP: FreeRDP: Denial of Service due to buffer over-read in RPC gateway (CVE-2026-91959)

    * FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service or information disclosure     (CVE-2026-91950)

    * FreeRDP: FreeRDP: Denial of Service via integer overflow and double free in WinPR (CVE-2026-91960)

    * FreeRDP: FreeRDP: Heap buffer overflow via oversized LB_LOAD_BALANCE_INFO routing token can lead to heap     corruption. (CVE-2026-91953)

    * FreeRDP: FreeRDP: Denial of Service due to out-of-bounds read in smartcard response processing     (CVE-2026-91945)

    * freerdp: FreeRDP: Denial of Service via uninitialized progressive tile handling (CVE-2026-109242)

    * freerdp: FreeRDP 3.0.0-beta1 before 3.32.0 Use-After-Free via Smartcard Connect (CVE-2026-109676)

    * freerdp: FreeRDP: Unauthenticated keystroke injection via premature input dispatch (CVE-2026-110838)

    * freerdp: freerdp: Denial of Service via file descriptor exhaustion in serial device handling     (CVE-2026-110830)

    * freerdp: freerdp: Denial of Service via heap-based buffer overflow during MP3 audio decoding     (CVE-2026-110837)

    * freerdp: freerdp: Denial of Service via unbounded memory consumption during RDPDR reassembly     (CVE-2026-110833)

    * freerdp: FreeRDP: Denial of Service via grayscale JPEG clipboard conversion (CVE-2026-110839)

    * freerdp: freerdp: Denial of Service via memory exhaustion in NLA frame parser (CVE-2026-111378)

    * freerdp: FreeRDP: Arbitrary code execution via crafted persistent cache file (CVE-2026-111379)

    * freerdp: freerdp: Arbitrary code execution via crafted persistent cache file (CVE-2026-111381)

    * freerdp: freerdp: Arbitrary code execution via crafted display frames (CVE-2026-111382)

    * freerdp: freerdp: Denial of Service via heap out-of-bounds write in NTLM authentication     (CVE-2026-111880)

    * freerdp: FreeRDP: heap buffer overflow in server rdpsnd via crafted audio formats (CVE-2026-114045)

    * freerdp: FreeRDP: Denial of Service via malformed image clipboard payloads (CVE-2026-121386)

    * freerdp: freerdp: Denial of Service via zero-width graphics reset (CVE-2026-121402)

    * freerdp: freerdp: Denial of Service via zero-length dynamic virtual channel messages (CVE-2026-121404)

    * freerdp: freerdp: Denial of Service via uncontrolled memory allocation in dynamic virtual channels     (CVE-2026-121388)

    * freerdp: FreeRDP: Denial of Service via assertion failure in RemoteFX decoder (CVE-2026-121394)

    Bug Fix(es) and Enhancement(s):

    * Rebase FreeRDP to 3.32.2 or newer [rhel-10.3.z] (JIRA:RHEL-277443)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

ID	Name	Product	Family	Published	Updated	Severity
376233	Linux Distros Unpatched Vulnerability : CVE-2026-121958	Nessus	Misc.	11/5/2026	11/9/2026	high
379032	RHEL 10 : freerdp (RHSA-2026:98598)	Nessus	Red Hat Local Security Checks	11/11/2026	11/12/2026	critical

Detections

Analytics

Plugins Search

high

critical