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

  - FreeRDP before 3.32.2 contains a use-after-free vulnerability that allows malicious RDP servers to corrupt     client memory by racing the RDPGFX ResetGraphics handler against the planar bitmap decoder. Attackers can     send ResetGraphics while concurrently sending compressed bitmaps of 32 bpp or more to trigger heap use-     after-free or out-of-bounds read/write on shared planar buffers. (CVE-2026-121957)

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3435 advisory.

    FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path     input event with an unknown message type without checking it lies within the packet's declared length,     causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated     unknown input event to abort assertion-enabled server processes, causing denial of service.
    (CVE-2026-121951)

    FreeRDP before 3.32.2 contains a use-after-free vulnerability in Emulate_SCardReleaseContext that frees     the emulated SCardContext before its worker thread is cancelled and joined. A malicious server can send     ESTABLISHCONTEXT, a long-timeout GETSTATUSCHANGE, then RELEASECONTEXT smartcard IRPs to corrupt heap     memory or crash clients using smartcard emulation. (CVE-2026-121955)

    FreeRDP before 3.32.2 contains a double free in the WinPR Kerberos SSPI retrieveSomeTgt function, which     installs the krb5 default realm into a target principal that has an empty realm without taking ownership     of it. Unauthenticated remote clients can send a crafted NLA/CredSSP u2u TGT request whose server-name     component contains '@' to corrupt the heap and crash the server process. (CVE-2026-121956)

    FreeRDP before 3.32.2 contains a use-after-free vulnerability that allows malicious RDP servers to corrupt     client memory by racing the RDPGFX ResetGraphics handler against the planar bitmap decoder. Attackers can     send ResetGraphics while concurrently sending compressed bitmaps of 32 bpp or more to trigger heap use-     after-free or out-of-bounds read/write on shared planar buffers. (CVE-2026-121957)

    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)

    FreeRDP before 3.32.2 contains a denial of service vulnerability in the NLA-enabled shadow server when a     CredSSP TSRequest omits negoTokens. Unauthenticated attackers can send a crafted seven-byte TSRequest     containing only the version field to trigger a fatal WINPR_ASSERT and abort the server process.
    (CVE-2026-121960)

    FreeRDP before 3.32.2 contains a heap buffer overflow in transport_default_read_pdu when handling partial     Early User Authorization reads during PROTOCOL_HYBRID_EX CredSSP. A malicious RDP server can split the     four-byte EUA result into short reads that advance the stream pointer beyond the 16 KiB allocation,     causing an out-of-bounds write and client denial of service. (CVE-2026-121962)

    FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where     rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP fragments into a persistent PDU stream     after checking only total capacity rather than remaining capacity from the current stream position. A     malicious or compromised RD Gateway can send crafted RPC fragments with manipulated alloc_hint and     frag_length values to overwrite client heap memory with attacker-controlled data, causing a crash or     potentially arbitrary code execution. (CVE-2026-121964)

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 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	名前	製品	ファミリー	公開日	更新日	深刻度
376212	Linux Distros Unpatched Vulnerability : CVE-2026-121957	Nessus	Misc.	2026/11/5	2026/11/9	high
379818	Amazon Linux 2023 : freerdp, freerdp-devel, freerdp-libs (ALAS2023-2026-3435)	Nessus	Amazon Linux Local Security Checks	2026/11/12	2026/11/12	high
379032	RHEL 10 : freerdp (RHSA-2026:98598)	Nessus	Red Hat Local Security Checks	2026/11/11	2026/11/12	critical

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