{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121626", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-03T16:57:44.441Z", "datePublished": "2026-11-03T17:13:53.309Z", "dateUpdated": "2026-11-07T03:19:22.751Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-03T17:13:53.309Z"}, "datePublic": "2026-08-25T00:00:00.000Z", "title": "GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler", "descriptions": [{"lang": "en", "value": "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."}], "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/160aa27344ecc9a443cccaa63e8d7fa95a766610", "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/GkClient.cxx#L963-L990", "tags": ["technical-description"]}, {"url": "https://github.com/willamowius/gnugk", "tags": ["product"]}, {"name": "VulnCheck Advisory: GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler"}], "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": "2026-11-07T03:19:14.533230Z", "id": "CVE-2026-121626", "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": "2026-11-07T03:19:22.751Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121626", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-03T16:57:44.441Z", "datePublished": "2026-11-03T17:13:53.309Z", "dateUpdated": "2026-11-07T03:19:22.751Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-03T17:13:53.309Z"}, "datePublic": "2026-08-25T00:00:00.000Z", "title": "GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler", "descriptions": [{"lang": "en", "value": "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."}], "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/160aa27344ecc9a443cccaa63e8d7fa95a766610", "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/GkClient.cxx#L963-L990", "tags": ["technical-description"]}, {"url": "https://github.com/willamowius/gnugk", "tags": ["product"]}, {"name": "VulnCheck Advisory: GNU Gatekeeper before 5.16 Out-of-Bounds Read in H.460.24 RTCP Probe Handler", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler"}], "credits": [{"lang": "en", "value": "Tristan Madani (Talence Security)", "type": "finder"}, {"lang": "en", "value": "Jan Willamowius", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-121626", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-07T03:19:14.533230Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-07T03:19:19.225Z"}}]}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "gnugk", "vendor": "willamowius", "versions": [{"lessThan": "5.16", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-121626", "lastModified": "2026-11-07T04:17:27.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-121626", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-07T03:19:14.533230Z", "version": "2.0.3"}}]}, "published": "2026-11-03T18:17:58.623", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/willamowius/gnugk"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/willamowius/gnugk/blob/v5_15/GkClient.cxx#L963-L990"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/willamowius/gnugk/commit/160aa27344ecc9a443cccaa63e8d7fa95a766610"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/willamowius/gnugk/releases/tag/v5_16"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/gnu-gatekeeper-before-5.16-out-of-bounds-read-in-h-460.24-rtcp-probe-handler"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}