{"id":"CVE-2026-119600","state":"PUBLISHED","title":"tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length","description":"tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.","publishedAt":"2026-10-30T13:18:19.167Z","updatedAt":"2026-10-30T13:18:19.167Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["simsong tcpflow"],"affected":[{"vendor":"simsong","product":"tcpflow","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.6.1","versionType":"semver"}],"repo":"https://github.com/simsong/tcpflow"}],"references":["https://github.com/simsong/tcpflow/issues/279","https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L781","https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L747","https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-read","https://github.com/simsong/tcpflow","https://www.vulncheck.com/advisories/tcpflow-through-1.6.1-out-of-bounds-read-via-tcp-demultiplexer-payload-length"],"weaknesses":["CWE-130"],"ingestedAt":"2026-10-30T13:22:06.632Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/119xxx/CVE-2026-119600.json","commit":"abd2ae26f2ff440b8bdf0bfcfbf8e5180068914a","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-119600","state":"PUBLISHED","datePublished":"2026-10-30T13:18:19.167Z","dateUpdated":"2026-10-30T13:18:19.167Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-30T11:46:46.502Z"},"containers":{"cna":{"title":"tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length","descriptions":[{"lang":"en","value":"tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow."}],"affected":[{"vendor":"simsong","product":"tcpflow","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.6.1","versionType":"semver"}],"repo":"https://github.com/simsong/tcpflow"}],"references":[{"url":"https://github.com/simsong/tcpflow/issues/279","tags":["issue-tracking"]},{"url":"https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L781","tags":["technical-description"]},{"url":"https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L747","tags":["technical-description"]},{"url":"https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-read","tags":["third-party-advisory"]},{"url":"https://github.com/simsong/tcpflow","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/tcpflow-through-1.6.1-out-of-bounds-read-via-tcp-demultiplexer-payload-length","name":"VulnCheck Advisory: tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"LOW","baseScore":4.8,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-130","lang":"en","description":"Improper Handling of Length Parameter Inconsistency","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-30T13:18:19.167Z"},"datePublic":"2026-10-22T00:00:00.000Z","credits":[{"lang":"en","value":"HaiND from the Post and Telecommunication Institute of Technology","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}