{"id":"UBUNTU-CVE-2026-42285","details":"GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending a specially crafted BGP UPDATE message. When the server receives a message with inconsistent attribute lengths, it improperly handles the internal state transition to a \"withdraw\" action, leading to a nil pointer dereference in the AdjRib.Update function. This causes the entire GoBGP process to crash, resulting in a complete loss of service availability. This issue has been patched in version 4.5.0.","modified":"2026-06-03T09:15:08.013458641Z","published":"2026-05-07T12:16:00Z","withdrawn":"2026-06-03T08:46:15Z","upstream":["CVE-2026-42285"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42285"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42285"}],"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"}]}],"versions":["1.15-1","1.29-1","1.29-1ubuntu0.1+esm1","1.29-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"1.29-1ubuntu0.1+esm2"},{"binary_version":"1.29-1ubuntu0.1+esm2","binary_name":"golang-github-osrg-gobgp-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42285.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"}]}],"versions":["1.33-1","2.11.0-1","2.12.0-1","2.12.0-1ubuntu0.1~esm1","2.12.0-1ubuntu0.1~esm2","2.12.0-1ubuntu0.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"2.12.0-1ubuntu0.1~esm3"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"2.12.0-1ubuntu0.1~esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42285.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"}]}],"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","2.25.0-3ubuntu0.1+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"2.25.0-3ubuntu0.1+esm4"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"2.25.0-3ubuntu0.1+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42285.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"}]}],"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","3.23.0-1ubuntu0.3+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"gobgpd","binary_version":"3.23.0-1ubuntu0.3+esm4"},{"binary_version":"3.23.0-1ubuntu0.3+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-2026-42285.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_version":"3.36.0-2","binary_name":"gobgpd"},{"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-2026-42285.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"}]}],"versions":["3.36.0-2","3.36.0-2build1","3.36.0-2ubuntu0.1~esm1"],"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"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42285.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"}]}