{"schema":"threatline.record/2","record":{"id":"CVE-2026-99072","aliases":[],"summary":"ipv4: stop route notification sizing when nexthop group shrinks","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: stop route notification sizing when nexthop group shrinks\n\nCommit 680aea08e78c (\"net: ipv4: Emit notification when fib\nhardware flags are changed\") added an RCU-only fib_nlmsg_size() call\nfor asynchronous hardware flag notifications.\n\nfib_nlmsg_size() checks fib_info_num_path() before each iteration,\nthen fib_info_nhc() independently reloads nh->nh_grp. If\nRTM_NEWNEXTHOP replaces a group with fewer paths between those loads,\nfib_info_nhc() returns NULL and fib_nexthop_nlmsg_size() dereferences\nit.\n\nStop sizing when the indexed path is absent. Nexthop groups are\ndense, so the current snapshot has no later path.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99072","source_modified_at":"2026-10-23T12:23:15.735Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"680aea08e78c003292415518ad270bc20f9c80b1","lessThan":"72d9d17092bb37b0717f12042a0817d01a1f9e78","status":"affected","versionType":"git"},{"version":"680aea08e78c003292415518ad270bc20f9c80b1","lessThan":"ad1c9f1b98c92609e9bb2ae8f05916defc3b0a54","status":"affected","versionType":"git"},{"version":"680aea08e78c003292415518ad270bc20f9c80b1","lessThan":"c1f48d1c2d5e9efd904dbbc2f2b3d41543e55c49","status":"affected","versionType":"git"},{"version":"680aea08e78c003292415518ad270bc20f9c80b1","lessThan":"ad2b3a68b8a7d5d27de88e05674e4adb1ce46d88","status":"affected","versionType":"git"},{"version":"680aea08e78c003292415518ad270bc20f9c80b1","lessThan":"d3daa33c7af92e38f2274bbd2576f58bfbaf89e6","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99072","source_modified_at":"2026-10-23T12:23:15.735Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.12","status":"affected"},{"version":"0","lessThan":"5.12","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","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-2026-99072","source_modified_at":"2026-10-23T12:23:15.735Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"72d9d17092bb37b0717f12042a0817d01a1f9e78","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:23:15.735Z","modified_at":"2026-10-23T12:23:15.735Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99072","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:23:15.735Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/72d9d17092bb37b0717f12042a0817d01a1f9e78"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ad1c9f1b98c92609e9bb2ae8f05916defc3b0a54"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c1f48d1c2d5e9efd904dbbc2f2b3d41543e55c49"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ad2b3a68b8a7d5d27de88e05674e4adb1ce46d88"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d3daa33c7af92e38f2274bbd2576f58bfbaf89e6"}],"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":"2026-10-23T12:23:15.735Z","content_hash":"3e7cfb1d43ffbcc95906e9b6db45aeb46b5a436cc5a8a83797d6ff5f88f75315"}}