{"schema":"threatline.record/2","record":{"id":"CVE-2026-98853","aliases":[],"summary":"net: gso: limit recursive IP-in-IP segmentation","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gso: limit recursive IP-in-IP segmentation\n\nIP-in-IP GSO can re-enter inet_gso_segment() or ipv6_gso_segment()\nfor each nested IP header. encap_level tracks header bytes, not callback\ndepth, so a deep chain can exhaust the kernel stack. Making\ninet_gso_segment() stackable introduced unbounded IPv4 nesting; IPIP\nGSO/TSO later made the path reachable. The IPv6 stackable path was\nintroduced separately and uses the same guard.\n\nCount IPv4 and IPv6 GSO handler entries in skb_gso_cb, initialized once\nper top-level GSO operation and preserved across GRE/UDP context changes.\nUse the existing IP_TUNNEL_RECURSION_LIMIT for both handlers. The first\nfive entries pass, and the sixth returns -EINVAL before dispatching\nanother GSO callback.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98853","source_modified_at":"2026-10-19T09:26:48.042Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3347c960295583eee3fd58e5c539fb1972fbc005","lessThan":"c949646c900e879afce47df1b607fa320eb63bf2","status":"affected","versionType":"git"},{"version":"3347c960295583eee3fd58e5c539fb1972fbc005","lessThan":"006c8b834aed8b02bd8fb9fb05e9e7ead37d1763","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98853","source_modified_at":"2026-10-19T09:26:48.042Z","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":"7.2.10","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-2026-98853","source_modified_at":"2026-10-19T09:26:48.042Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"006c8b834aed8b02bd8fb9fb05e9e7ead37d1763","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00145,"percentile":0.03449,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:51:02.683Z","modified_at":"2026-10-19T09:26:48.042Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98853","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:26:48.042Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98853","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/c949646c900e879afce47df1b607fa320eb63bf2"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/006c8b834aed8b02bd8fb9fb05e9e7ead37d1763"}],"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":"2026-10-19T09:26:48.042Z","content_hash":"ea4cbdcd570854eb01b5388d33cfc5e4d1eb96f811cc31e41dcfbfbb57c8c1cd"}}