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    CVE-2026-121950

    FreeRDP before 3.32.2 does not check the product of surface dimensions in gdi_CreateSurface when handling an RDPGFX CREATE_SURFACE PDU, causing an integer wrap and heap buffer overflow on 32-bit builds and an approximately 4 GiB allocation on 64-bit builds. A malicious RDP server can send a CREATE_SURFACE PDU with width and height 32766 to a connecting client to corrupt heap memory or cause a denial of service.

    Published:Nov 4, 2026
    Last Modified:Nov 4, 2026
    EPS:Nov 4, 2026
    EPSS Score:
    CVSS Score:6.5

    Affected Products

    Vendor
    Freerdp
    Product
    Freerdp

    Exploits

    https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f53w-3364-jr35https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f53w-3364-jr35

    Common Weakness Enumeration

    CWE-122 Heap-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-121964 (CVSS 8.7) — FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_rec…
    CVE-2026-121963 (CVSS 8.2) — FreeRDP before 3.32.2 contains a use-after-free vulnerability in the asynchronous dynamic rdpsnd channel that …
    CVE-2026-121962 (CVSS 7.2) — FreeRDP before 3.32.2 contains a heap buffer overflow in transport_default_read_pdu when handling partial Earl…
    CVE-2026-121961 (CVSS 8.2) — FreeRDP before 3.32.2 contains a use-after-free vulnerability in the freerdp-proxy DRDYNVC tracker when interc…
    CVE-2026-121960 (CVSS 8.7) — FreeRDP before 3.32.2 contains a denial of service vulnerability in the NLA-enabled shadow server when a CredS…
    CVE-2026-121959 (CVSS 7.1) — FreeRDP before 3.32.2 contains an infinite loop vulnerability in websocket_context_read that fails to handle a…
    CVE-2026-121958 (CVSS 8.7) — FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback…
    CVE-2026-121957 (CVSS 8.7) — FreeRDP before 3.32.2 contains a use-after-free vulnerability that allows malicious RDP servers to corrupt cli…
    CVE-2026-121956 (CVSS 8.7) — FreeRDP before 3.32.2 contains a double free in the WinPR Kerberos SSPI retrieveSomeTgt function, which instal…
    CVE-2026-121955 (CVSS 8.7) — FreeRDP before 3.32.2 contains a use-after-free vulnerability in Emulate_SCardReleaseContext that frees the em…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High