UBUNTU-CVE-2026-121626

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    UBUNTU-CVE-2026-121626

    Published: 3 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-121626

    Summary:

    Details: GNU Gatekeeper (gnugk) before 5.16 contains an out-of-bounds read vulnerability in H46024Socket::ReceivedProbePacket() that allows remote attackers to cause a heap over-read by sending short probe packets. Attackers can send a short application-defined RTCP packet to the media port during H.460.24 probing to read past the heap allocation and possibly crash the gatekeeper.

    References: https://ubuntu.com/security/CVE-2026-121626, https://www.cve.org/CVERecord?id=CVE-2026-121626, https://github.com/willamowius/gnugk, https://github.com/willamowius/gnugk/blob/v5_15/GkClient.cxx#L963-L990, https://github.com/willamowius/gnugk/commit/160aa27344ecc9a443cccaa63e8d7fa95a766610, https://github.com/willamowius/gnugk/releases/tag/v5_16, https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler

    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-2026-121626 | CVE-DB