{"schema":"threatline.record/2","record":{"id":"CVE-2026-98573","aliases":[],"summary":"net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()\n\nskb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max\nargument and passes the result to __pskb_pull_tail() as a signed int.  The\nfunction does not ensure that max is at least skb_headlen(skb).\n\nThis can happen while parsing IPv6 extension headers when an skb already\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data\nbeyond the linear area, max - skb_headlen(skb) wraps and is converted to a\nnegative delta.  __pskb_pull_tail() then passes that negative length to\nskb_copy_bits(), where it can become a very large copy length.\n\nPass the requested length itself as the pull bound at the three\nextension-header call sites, so the delta can no longer go negative.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","source_modified_at":"2026-10-19T09:21:58.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"9c4e432132a97b82edf28fa172c39f743e6bfb26","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"718747afa5463d9cc5fd9a09f03b2a492edd9b78","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"a0ad0473c09d2e947aecac5c82e637ec85924b12","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"b2da5ed3d8c75e1b729a21b6d3beaed415e263f6","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"d7f474226809471dc7877435e9c492cc914df0bf","status":"affected","versionType":"git"},{"version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","lessThan":"3b4e0b0c008a8c1b474730248cd5b873026c74bd","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","source_modified_at":"2026-10-19T09:21:58.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.13","status":"affected"},{"version":"0","lessThan":"3.13","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","source_modified_at":"2026-10-19T09:21:58.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9c4e432132a97b82edf28fa172c39f743e6bfb26","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","source_modified_at":"2026-10-19T09:21:58.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"718747afa5463d9cc5fd9a09f03b2a492edd9b78","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","source_modified_at":"2026-10-19T09:21:58.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","source_modified_at":"2026-10-19T09:21:58.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3b4e0b0c008a8c1b474730248cd5b873026c74bd","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.0021,"percentile":0.107,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:18:38.914Z","modified_at":"2026-10-19T09:21:58.681Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:21:58.681Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98573","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:21:58.681Z","content_hash":"22dddfe897b46318c13b1dad594f50ca5bd7ef2bdc9bf85c265d621cacdf516b"}}