{"id":"CVE-2026-121626","title":"GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler","summary":"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 appl…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-125"],"vendor":"willamowius","product":"gnugk","affected":["gnugk < 5.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-07T03:19:14.533230Z"},"published":"2026-11-03","updated":"2026-11-07","sourceUpdated":"2026-11-07T03:19:22.751Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121626","references":[{"url":"https://github.com/willamowius/gnugk/commit/160aa27344ecc9a443cccaa63e8d7fa95a766610","label":"Patch Commit"},{"url":"https://github.com/willamowius/gnugk/releases/tag/v5_16","label":"gnugk v5_16 Release Notes"},{"url":"https://github.com/willamowius/gnugk/blob/v5_15/GkClient.cxx#L963-L990"},{"url":"https://github.com/willamowius/gnugk"},{"url":"https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler","label":"VulnCheck Advisory: GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler"}],"tags":["cve.org"],"epss":0.00338,"epssPercentile":0.27394,"ingestedAt":"2026-11-05T20:33:06.317Z","slug":"CVE-2026-121626","body":"## Overview\n\nGNU 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.\n\n## Affected\n\n- `gnugk < 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}