CVE-2026-121950

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    CVE-2026-121950

    Published: 4 Nov 2026Last Modified: 7 Nov 2026

    Summary: FreeRDP before 3.32.2 Heap Overflow via RDPGFX CREATE_SURFACE Integer Wrap

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121950.json, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f53w-3364-jr35, https://nvd.nist.gov/vuln/detail/CVE-2026-121950, https://www.vulncheck.com/advisories/freerdp-before-3.32.2-heap-overflow-via-rdpgfx-create-surface-integer-wrap

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -97eff6ddfbbfaa8e42a126d362686bd001ff8bdc

    Affected versions

    3.5.1
    3.5.0

    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
    CVE-2026-121950 | CVE-DB