{"id":"CVE-2026-28532","title":"FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions","summary":"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() macr…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-190","CWE-125"],"vendor":"FRRouting","product":"frr","affected":["frr < 10.5.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-05-01T16:36:13.274707Z"},"published":"2026-04-30","updated":"2026-10-01","sourceUpdated":"2026-10-01T15:19:54.314Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-28532","references":[{"url":"https://github.com/FRRouting/frr/releases/tag/frr-10.5.3"},{"url":"https://github.com/FRRouting/frr/pull/21002"},{"url":"https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd"},{"url":"https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions"}],"tags":["cve.org"],"epss":0.00374,"epssPercentile":0.28975,"ingestedAt":"2026-10-01T15:48:17.866Z","slug":"CVE-2026-28532","body":"## Overview\n\nFRRouting 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.\n\n## Affected\n\n- `frr < 10.5.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}