CVE-2026-121626

    Dashboard / Vulnerabilities / CVE-2026-121626

    CVE-2026-121626

    Published: 3 Nov 2026Last Modified: 8 Nov 2026

    Summary: GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler

    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://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121626.json, https://github.com/willamowius/gnugk/releases/tag/v5_16, https://nvd.nist.gov/vuln/detail/CVE-2026-121626, https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler, https://github.com/willamowius/gnugk/commit/160aa27344ecc9a443cccaa63e8d7fa95a766610, https://github.com/willamowius/gnugk, https://github.com/willamowius/gnugk/blob/v5_15/GkClient.cxx#L963-L990

    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-2026-121626 | CVE-DB