UBUNTU-CVE-2026-121625

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    UBUNTU-CVE-2026-121625

    Published: 3 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-121625

    Summary:

    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://ubuntu.com/security/CVE-2026-121625, https://www.cve.org/CVERecord?id=CVE-2026-121625, https://github.com/willamowius/gnugk, https://github.com/willamowius/gnugk/blob/v5_15/ProxyChannel.cxx#L14867-L14895, https://github.com/willamowius/gnugk/commit/e8939d03b0b2ef46e356f3144a6ee14f2920b777, https://github.com/willamowius/gnugk/releases/tag/v5_16, https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-via-rtcp-sdes-parsing

    Affected packages

    Package

    Name: gnugk

    Purl: pkg:deb/ubuntu/gnugk?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2:3.6-1build1

    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
    UBUNTU-CVE-2026-121625 | CVE-DB