{"id":"CVE-2026-28532","state":"PUBLISHED","title":"FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions","description":"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.","publishedAt":"2026-04-30T20:17:51.060Z","updatedAt":"2026-10-01T15:19:54.314Z","severity":{"score":6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["FRRouting frr"],"affected":[{"vendor":"FRRouting","product":"frr","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"10.5.3","versionType":"semver"}]}],"references":["https://github.com/FRRouting/frr/releases/tag/frr-10.5.3","https://github.com/FRRouting/frr/pull/21002","https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd","https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions"],"weaknesses":["CWE-190","CWE-125"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/28xxx/CVE-2026-28532.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28532","state":"PUBLISHED","datePublished":"2026-04-30T20:17:51.060Z","dateUpdated":"2026-10-01T15:19:54.314Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-02-27T21:07:55.469Z"},"containers":{"cna":{"title":"FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"FRRouting","product":"frr","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"10.5.3","versionType":"semver"}]}],"references":[{"url":"https://github.com/FRRouting/frr/releases/tag/frr-10.5.3","tags":["release-notes"]},{"url":"https://github.com/FRRouting/frr/pull/21002","tags":["issue-tracking"]},{"url":"https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6,"vectorString":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"},{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-01T15:19:54.314Z"},"datePublic":"2026-03-05T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*","versionEndExcluding":"10.5.3"}]}]}],"tags":["x_open-source"],"source":{"discovery":"UNKNOWN"},"credits":[{"lang":"en","value":"Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.","type":"finder"},{"lang":"en","value":"VulnCheck","type":"finder"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-01T16:36:13.274707Z","id":"CVE-2026-28532","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-01T19:46:14.169Z"}}]}}}