CVE-2023-40187

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    CVE-2023-40187

    Published: 31 Aug 2023Last Modified: 12 Aug 2026

    Summary: Use-After-Free in FreeRDP

    Details: FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions of the 3.x beta branch are subject to a Use-After-Free issue in the `avc420_ensure_buffer` and `avc444_ensure_buffer` functions. If the value of `piDstSize[x]` is 0, `ppYUVDstData[x]` will be freed. However, in this case `ppYUVDstData[x]` will not have been updated which leads to a Use-After-Free vulnerability. This issue has been addressed in version 3.0.0-beta3. Users of the 3.x beta releases are advised to upgrade. There are no known workarounds for this vulnerability.

    References: https://github.com/FreeRDP/FreeRDP/blob/5be5553e0da72178a4b94cc1ffbdace9ceb153e5/libfreerdp/codec/h264.c#L413-L427, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40187.json, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pwf9-v5p9-ch4f, https://nvd.nist.gov/vuln/detail/CVE-2023-40187, https://security.gentoo.org/glsa/202401-16

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- f468a06d88c55b9ed484757326a9528cf27d33f4
    Fixed -59a5726ab36338776539192cae2563951d0ce94b

    Affected versions

    3.0.0-beta1
    3.0.0-beta2

    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-2023-40187 | CVE-DB