{"id":"CVE-2026-121626","aliases":["EUVD-2026-116101","GHSA-7qx5-2whq-73x6","UBUNTU-CVE-2026-121626"],"status":"published","title":"GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler","description":"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.","severity":{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00338,"percentile":0.27601,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-11-03T17:13:53Z","modified":"2026-11-05T11:46:32Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gnugk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:3.6-1build1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"gnugk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:3.6-1build2"]}],"products":[{"vendor":"willamowius","product":"gnugk"}],"references":[{"url":"https://github.com/willamowius/gnugk/commit/160aa27344ecc9a443cccaa63e8d7fa95a766610","tags":["patch","fix","report"]},{"url":"https://github.com/willamowius/gnugk/releases/tag/v5_16","tags":["release-notes","advisory","report"]},{"url":"https://github.com/willamowius/gnugk/blob/v5_15/GkClient.cxx#L963-L990","tags":["technical-description","article","report"]},{"url":"https://github.com/willamowius/gnugk","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121626","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-7qx5-2whq-73x6"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121626.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-121626","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-121626","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-121626","title":"GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler","description":"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.","status":"published","published":"2026-11-03T17:13:53.309Z","modified":"2026-11-07T03:19:22.751Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-07T04:32:31.343254Z"}],"euvd":[{"id":"EUVD-2026-116101","description":"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.","status":"published","published":"2026-11-03T17:13:53Z","modified":"2026-11-07T03:19:22Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-07T04:08:16.282099Z"}],"ghsa":[{"id":"GHSA-7qx5-2whq-73x6","title":"GNU Gatekeeper (gnugk) before 5.16 contains an out-of-bounds read vulnerability in H46024Socket:...","description":"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.","status":"published","published":"2026-11-03T18:31:10Z","modified":"2026-11-03T18:31:11Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":6.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-03T19:01:33.107181Z"}],"nvd":[{"id":"CVE-2026-121626","description":"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.","status":"published","published":"2026-11-03T18:17:58.623Z","modified":"2026-11-12T21:30:23.87Z","cvss":[{"version":"4.0","score":6.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-07T07:04:25.467195Z"}],"osv":[{"id":"CVE-2026-121626","title":"GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler","description":"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.","status":"published","published":"2026-11-03T17:13:53.309Z","modified":"2026-11-08T07:04:01.113253622Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-08T02:57:14.556074Z"},{"id":"UBUNTU-CVE-2026-121626","description":"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.","status":"published","published":"2026-11-03T18:17:00Z","modified":"2026-11-05T11:46:32.797426771Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-05T13:30:15.321876Z"}]}}