{"id":"UBUNTU-CVE-2026-41643","details":"GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.","modified":"2026-06-03T09:15:18.013532940Z","published":"2026-05-07T12:16:00Z","related":["USN-8348-1"],"upstream":["CVE-2026-41643"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41643"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-41643"},{"type":"REPORT","url":"https://github.com/osrg/gobgp/issues/3308"},{"type":"REPORT","url":"https://github.com/osrg/gobgp/commit/9fe96a9b92918e782c2d054e305fc96b48f3e8e4"},{"type":"REPORT","url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8348-1"}],"affected":[{"package":{"name":"gobgp","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29-1ubuntu0.1+esm2"}]}],"versions":["1.15-1","1.29-1","1.29-1ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"1.29-1ubuntu0.1+esm2"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"1.29-1ubuntu0.1+esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41643.json"}},{"package":{"name":"gobgp","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.0-1ubuntu0.1~esm3"}]}],"versions":["1.33-1","2.11.0-1","2.12.0-1","2.12.0-1ubuntu0.1~esm1","2.12.0-1ubuntu0.1~esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"gobgpd","binary_version":"2.12.0-1ubuntu0.1~esm3"},{"binary_version":"2.12.0-1ubuntu0.1~esm3","binary_name":"golang-github-osrg-gobgp-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41643.json"}},{"package":{"name":"gobgp","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.25.0-3ubuntu0.1+esm4"}]}],"versions":["2.25.0-2","2.25.0-3","2.25.0-3build1","2.25.0-3ubuntu0.1","2.25.0-3ubuntu0.1+esm1","2.25.0-3ubuntu0.1+esm2","2.25.0-3ubuntu0.1+esm3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"2.25.0-3ubuntu0.1+esm4","binary_name":"gobgpd"},{"binary_version":"2.25.0-3ubuntu0.1+esm4","binary_name":"golang-github-osrg-gobgp-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41643.json"}},{"package":{"name":"gobgp","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.23.0-1ubuntu0.3+esm4"}]}],"versions":["3.16.0-1build1","3.19.0-1","3.21.0-1","3.23.0-1","3.23.0-1ubuntu0.1","3.23.0-1ubuntu0.2","3.23.0-1ubuntu0.2+esm1","3.23.0-1ubuntu0.3","3.23.0-1ubuntu0.3+esm1","3.23.0-1ubuntu0.3+esm2","3.23.0-1ubuntu0.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"3.23.0-1ubuntu0.3+esm4"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"3.23.0-1ubuntu0.3+esm4"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41643.json"}},{"package":{"name":"gobgp","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/gobgp?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.35.0-1","3.36.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"3.36.0-2"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"3.36.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41643.json"}},{"package":{"name":"gobgp","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.36.0-2ubuntu0.1~esm1"}]}],"versions":["3.36.0-2","3.36.0-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"3.36.0-2ubuntu0.1~esm1"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"3.36.0-2ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41643.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}