{"id":"CVE-2026-121625","title":"GNU Gatekeeper before 5.16 Out-of-Bounds Read via RTCP SDES Parsing","summary":"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 b…","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":"2026-11-03T17:24:07.685551Z"},"published":"2026-11-03","updated":"2026-11-03","sourceUpdated":"2026-11-03T17:24:49.403Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121625","references":[{"url":"https://github.com/willamowius/gnugk/commit/e8939d03b0b2ef46e356f3144a6ee14f2920b777","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/ProxyChannel.cxx#L14867-L14895"},{"url":"https://github.com/willamowius/gnugk"},{"url":"https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-via-rtcp-sdes-parsing","label":"VulnCheck Advisory: GNU Gatekeeper before 5.16 Out-of-Bounds Read via RTCP SDES Parsing"}],"tags":["cve.org"],"epss":0.00362,"epssPercentile":0.30167,"ingestedAt":"2026-11-05T20:33:06.311Z","slug":"CVE-2026-121625","body":"## Overview\n\nGNU 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.\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":[]}