CVE-2026-121625

    Dashboard / Vulnerabilities / CVE-2026-121625

    CVE-2026-121625

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: GNU Gatekeeper before 5.16 Out-of-Bounds Read via RTCP SDES Parsing

    Details: GNU Gatekeeper (gnugk) before 5.16 contains an out-of-bounds read vulnerability in ParseRTCP() in ProxyChannel.cxx that allows remote RTP peers to read heap memory past received packets. Attackers can send RTCP SDES items lacking a NUL byte to the media proxy port during proxied H.323 calls with EnableRTCPStats enabled, crashing the gatekeeper.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121625.json, https://github.com/willamowius/gnugk/releases/tag/v5_16, https://nvd.nist.gov/vuln/detail/CVE-2026-121625, https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-via-rtcp-sdes-parsing, https://github.com/willamowius/gnugk/commit/e8939d03b0b2ef46e356f3144a6ee14f2920b777, https://github.com/willamowius/gnugk, https://github.com/willamowius/gnugk/blob/v5_15/ProxyChannel.cxx#L14867-L14895

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -d65ae8453e68d8a0e1f19c20042026f88b516832

    Affected versions

    v5_15

    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-2026-121625 | CVE-DB