{"id":"UBUNTU-CVE-2026-28532","details":"FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator variable truncates uint32_t values returned by the TLV_SIZE() macro, causing the loop termination condition to fail while pointer advancement continues unchecked. Attackers with an established OSPF adjacency can send a crafted LS Update packet with a malicious Type 10 or Type 11 Opaque LSA to trigger out-of-bounds memory reads and crash all affected routers in the OSPF area or autonomous system.","modified":"2026-06-03T22:07:49.804220260Z","published":"2026-04-30T21:16:00Z","related":["USN-8376-1"],"upstream":["CVE-2026-28532"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-28532"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-28532"},{"type":"REPORT","url":"https://github.com/FRRouting/frr/pull/21002"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8376-1"}],"affected":[{"package":{"name":"quagga","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/quagga?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.99.24.1-2","0.99.24.1-2ubuntu1","0.99.24.1-2ubuntu1.1","0.99.24.1-2ubuntu1.2","0.99.24.1-2ubuntu1.3","0.99.24.1-2ubuntu1.4","0.99.24.1-2ubuntu1.4+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"quagga","binary_version":"0.99.24.1-2ubuntu1.4+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28532.json"}},{"package":{"name":"quagga","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/quagga?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.1-3","1.1.1-3ubuntu1","1.2.2-1","1.2.2-1ubuntu1","1.2.4-1","1.2.4-1ubuntu0.1~esm1","1.2.4-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"quagga","binary_version":"1.2.4-1ubuntu0.1~esm2"},{"binary_name":"quagga-bgpd","binary_version":"1.2.4-1ubuntu0.1~esm2"},{"binary_name":"quagga-core","binary_version":"1.2.4-1ubuntu0.1~esm2"},{"binary_name":"quagga-isisd","binary_version":"1.2.4-1ubuntu0.1~esm2"},{"binary_name":"quagga-ospf6d","binary_version":"1.2.4-1ubuntu0.1~esm2"},{"binary_name":"quagga-ospfd","binary_version":"1.2.4-1ubuntu0.1~esm2"},{"binary_version":"1.2.4-1ubuntu0.1~esm2","binary_name":"quagga-pimd"},{"binary_version":"1.2.4-1ubuntu0.1~esm2","binary_name":"quagga-ripd"},{"binary_name":"quagga-ripngd","binary_version":"1.2.4-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28532.json"}},{"package":{"name":"quagga","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/quagga?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.4-4build1","1.2.4-4ubuntu0.1","1.2.4-4ubuntu0.4","1.2.4-4ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_name":"quagga","binary_version":"1.2.4-4ubuntu0.5"},{"binary_name":"quagga-bgpd","binary_version":"1.2.4-4ubuntu0.5"},{"binary_version":"1.2.4-4ubuntu0.5","binary_name":"quagga-core"},{"binary_version":"1.2.4-4ubuntu0.5","binary_name":"quagga-isisd"},{"binary_name":"quagga-ospf6d","binary_version":"1.2.4-4ubuntu0.5"},{"binary_name":"quagga-ospfd","binary_version":"1.2.4-4ubuntu0.5"},{"binary_version":"1.2.4-4ubuntu0.5","binary_name":"quagga-pimd"},{"binary_name":"quagga-ripd","binary_version":"1.2.4-4ubuntu0.5"},{"binary_version":"1.2.4-4ubuntu0.5","binary_name":"quagga-ripngd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28532.json"}},{"package":{"name":"frr","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/frr?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.2-2build2","7.2-1ubuntu1","7.2-1ubuntu2","7.2.1-1","7.2.1-1ubuntu0.1","7.2.1-1ubuntu0.2","7.2.1-1ubuntu0.2+esm1","7.2.1-1ubuntu0.2+esm2","7.2.1-1ubuntu0.2+esm3","7.2.1-1ubuntu0.2+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"frr","binary_version":"7.2.1-1ubuntu0.2+esm4"},{"binary_version":"7.2.1-1ubuntu0.2+esm4","binary_name":"frr-pythontools"},{"binary_name":"frr-rpki-rtrlib","binary_version":"7.2.1-1ubuntu0.2+esm4"},{"binary_name":"frr-snmp","binary_version":"7.2.1-1ubuntu0.2+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28532.json"}},{"package":{"name":"frr","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/frr?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1-1ubuntu1.16"}]}],"versions":["7.5.1-1.1","8.1-1","8.1-1ubuntu1","8.1-1ubuntu1.1","8.1-1ubuntu1.2","8.1-1ubuntu1.3","8.1-1ubuntu1.4","8.1-1ubuntu1.5","8.1-1ubuntu1.6","8.1-1ubuntu1.7","8.1-1ubuntu1.8","8.1-1ubuntu1.9","8.1-1ubuntu1.10","8.1-1ubuntu1.11","8.1-1ubuntu1.13","8.1-1ubuntu1.14","8.1-1ubuntu1.15"],"ecosystem_specific":{"binaries":[{"binary_version":"8.1-1ubuntu1.16","binary_name":"frr"},{"binary_name":"frr-pythontools","binary_version":"8.1-1ubuntu1.16"},{"binary_name":"frr-rpki-rtrlib","binary_version":"8.1-1ubuntu1.16"},{"binary_name":"frr-snmp","binary_version":"8.1-1ubuntu1.16"}],"availability":"No 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