{"schema":"threatline.record/2","record":{"id":"CVE-2026-98096","aliases":[],"summary":"ipv6: sr: restore network header before routing and forwarding","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: sr: restore network header before routing and forwarding\n\nipv6_srh_rcv() runs with skb->data at the Segment Routing Header (SRH)\nwhile skb_network_header() points at the IPv6 header.\n\nWhen segments_left > 0, ipv6_srh_rcv() previously restored the skb->data\nposition by pushing sizeof(struct ipv6hdr), assuming the SRH immediately\nfollowed the fixed IPv6 header. If another extension header (such as a\nHop-by-Hop options header) precedes the SRH, skb_network_offset()\nremained negative.\n\nThis led to two problems:\n1. During ip6_route_input(), fib6_rules_early_flow_dissect() invokes\n   __skb_flow_dissect() which passes the negative skb_network_offset()\n   to flow dissection, breaking BPF and C flow dissector logic.\n2. If forwarded via ip6_forward() or redirected via act_mirred, downstream\n   handlers (like sch_fragment() or neighbour output) pass the negative\n   offset as an unsigned length, triggering OOB memcpy or buffer overflows.\n\nFix this by pushing -skb_network_offset(skb) before routing, ensuring\nskb_network_offset(skb) is 0 for route lookup / flow dissection as well as\ndownstream forwarding. On the loopback path, pull skb_transport_offset(skb)\nto restore skb->data to the SRH before looping back.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"f463c4786cf27376de7dfc0833a12e924a98f698","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"8f44d4160bcdb3136a9145a4b9c7816382976925","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"9cfbe2c381ab6d00a08e7a5b6028865adfb4e1bc","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"af08f62b5a5a446d6134a92d86771d3d12e0e3da","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"ce4c8beedc19aceeab0e7bdc6f34394fb158c47c","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"97b21ef57dfabbff660a4672c9fef7edfb720f47","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"3ad7dca5e03bd64c65983a19734337512fd75491","status":"affected","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","lessThan":"975b5b067f525a1b1338c4a3bee1c46545801518","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.10","status":"affected"},{"version":"0","lessThan":"4.10","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":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","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-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8f44d4160bcdb3136a9145a4b9c7816382976925","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9cfbe2c381ab6d00a08e7a5b6028865adfb4e1bc","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"97b21ef57dfabbff660a4672c9fef7edfb720f47","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3ad7dca5e03bd64c65983a19734337512fd75491","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","source_modified_at":"2026-10-19T09:13:48.508Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"975b5b067f525a1b1338c4a3bee1c46545801518","basis":"first unaffected version stated in the CVE record"}],"cvss":7.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00511,"percentile":0.4277,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:24:27.098Z","modified_at":"2026-10-19T09:13:48.508Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98096","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:13:48.508Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98096","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/f463c4786cf27376de7dfc0833a12e924a98f698"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8f44d4160bcdb3136a9145a4b9c7816382976925"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9cfbe2c381ab6d00a08e7a5b6028865adfb4e1bc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/af08f62b5a5a446d6134a92d86771d3d12e0e3da"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ce4c8beedc19aceeab0e7bdc6f34394fb158c47c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/97b21ef57dfabbff660a4672c9fef7edfb720f47"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3ad7dca5e03bd64c65983a19734337512fd75491"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/975b5b067f525a1b1338c4a3bee1c46545801518"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:13:48.508Z","content_hash":"5fb9968ca11439cb64539c806ee879a37bb322cbf6bc32ea4eb026fa2352280f"}}