{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-121625","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-03T16:57:44.037Z","datePublished":"2026-11-03T17:13:52.678Z","dateUpdated":"2026-11-03T17:24:49.403Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-03T17:13:52.678Z"},"datePublic":"2026-08-25T00:00:00.000Z","title":"GNU Gatekeeper before 5.16 Out-of-Bounds Read via RTCP SDES Parsing","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Out-of-bounds Read","cweId":"CWE-125","type":"CWE"}]}],"affected":[{"vendor":"willamowius","product":"gnugk","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","versionType":"custom","lessThan":"5.16"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW"}}],"references":[{"url":"https://github.com/willamowius/gnugk/commit/e8939d03b0b2ef46e356f3144a6ee14f2920b777","tags":["patch"],"name":"Patch Commit"},{"url":"https://github.com/willamowius/gnugk/releases/tag/v5_16","tags":["release-notes"],"name":"gnugk v5_16 Release Notes"},{"url":"https://github.com/willamowius/gnugk/blob/v5_15/ProxyChannel.cxx#L14867-L14895","tags":["technical-description"]},{"url":"https://github.com/willamowius/gnugk","tags":["product"]},{"name":"VulnCheck Advisory: GNU Gatekeeper before 5.16 Out-of-Bounds Read via RTCP SDES Parsing","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-via-rtcp-sdes-parsing"}],"credits":[{"lang":"en","value":"Tristan Madani (Talence Security)","type":"finder"},{"lang":"en","value":"Jan Willamowius","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-03T17:24:07.685551Z","id":"CVE-2026-121625","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-03T17:24:49.403Z"}}]}}