{"id":"CVE-2026-41642","summary":"GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute","details":"GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP due to a nil pointer dereference. When a malformed BGP UPDATE message contains an unrecognized Path Attribute marked as \"Well-known,\" the daemon fails to interrupt the message handling flow. This results in an illegal memory access and a full process crash (panic). This issue has been patched in version 4.4.0.","aliases":["GHSA-7235-89m6-f4px","GO-2026-5198"],"modified":"2026-10-28T02:30:46.205580482Z","published":"2026-05-07T11:50:41.545Z","related":["SUSE-SU-2026:23216-1","SUSE-SU-2026:23227-1","openSUSE-SU-2026:21551-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41642.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-476"]},"references":[{"type":"WEB","url":"https://github.com/osrg/gobgp/releases/tag/v4.4.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41642.json"},{"type":"ADVISORY","url":"https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41642"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/osrg/gobgp","events":[{"introduced":"c3eb0db6df91379e15ce1a8709cb1b64f482248e"},{"fixed":"12b4ebaef14f61e1c7c7403c770b67826f0b8cf4"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"= 4.3.0"},{"last_affected":"= 4.3.0"}],"source":"AFFECTED_FIELD","strategy":"StandaloneSingleVersion"},{"original_tag":"v4.4.0","range":[{"fixed":"12b4ebaef14f61e1c7c7403c770b67826f0b8cf4"}],"source":"REFERENCES_TAG"}]}}],"versions":["4.3.0","= 4.3.0","v4.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41642.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}