{"id":"UBUNTU-CVE-2026-7736","details":"A vulnerability was determined in osrg GoBGP up to 4.3.0. Affected by this vulnerability is the function parseRibEntry of the file pkg/packet/mrt/mrt.go. Executing a manipulation can lead to integer underflow. It is possible to launch the attack remotely. Upgrading to version 4.4.0 addresses this issue. This patch is called 76d911046344a3923cbe573364197aa081944592. It is suggested to upgrade the affected component.","modified":"2026-06-03T09:15:18.494705058Z","published":"2026-05-04T07:16:00Z","related":["USN-8348-1"],"upstream":["CVE-2026-7736"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-7736"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-7736"},{"type":"REPORT","url":"https://github.com/osrg/gobgp/commit/76d911046344a3923cbe573364197aa081944592"},{"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-2026-7736.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":{"binaries":[{"binary_version":"2.12.0-1ubuntu0.1~esm3","binary_name":"gobgpd"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"2.12.0-1ubuntu0.1~esm3"}],"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-2026-7736.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":{"binaries":[{"binary_version":"2.25.0-3ubuntu0.1+esm4","binary_name":"gobgpd"},{"binary_name":"golang-github-osrg-gobgp-dev","binary_version":"2.25.0-3ubuntu0.1+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-2026-7736.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-2026-7736.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_version":"3.36.0-2","binary_name":"golang-github-osrg-gobgp-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.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_version":"3.36.0-2ubuntu0.1~esm1","binary_name":"gobgpd"},{"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-2026-7736.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:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}