{"schema":"threatline.record/2","record":{"id":"CVE-2026-99073","aliases":[],"summary":"ipv4: stop exception dump when nexthop group shrinks","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: stop exception dump when nexthop group shrinks\n\nCommit 4ce5dc9316de (\"inet: switch inet_dump_fib() to RCU\nprotection\") allowed IPv4 FIB dumps to run concurrently with nexthop\nreplacement.\n\nfib_dump_info_fnhe() uses fib_info_num_path() as the loop bound,\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 the dump dereferences it through\nnhc_flags.\n\nStop the walk 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-2026-99073","source_modified_at":"2026-10-23T12:23:16.935Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"4ce5dc9316de50e0da84beafe55d1344f829cece","lessThan":"f91e472821e32f58b03eb631e20a67157e2b928b","status":"affected","versionType":"git"},{"version":"4ce5dc9316de50e0da84beafe55d1344f829cece","lessThan":"21cba134c30c17ae55f468b5809336437df5d7e6","status":"affected","versionType":"git"},{"version":"4ce5dc9316de50e0da84beafe55d1344f829cece","lessThan":"b9a30bb7b831e8c5a47fadbdf1760918aaf009cc","status":"affected","versionType":"git"},{"version":"4ce5dc9316de50e0da84beafe55d1344f829cece","lessThan":"4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99073","source_modified_at":"2026-10-23T12:23:16.935Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.9","status":"affected"},{"version":"0","lessThan":"6.9","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-2026-99073","source_modified_at":"2026-10-23T12:23:16.935Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"21cba134c30c17ae55f468b5809336437df5d7e6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99073","source_modified_at":"2026-10-23T12:23:16.935Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2","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":"2026-10-23T12:23:16.935Z","modified_at":"2026-10-23T12:23:16.935Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99073","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:23:16.935Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/f91e472821e32f58b03eb631e20a67157e2b928b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/21cba134c30c17ae55f468b5809336437df5d7e6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b9a30bb7b831e8c5a47fadbdf1760918aaf009cc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2"}],"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":"2026-10-23T12:23:16.935Z","content_hash":"8a2da54801a1bcebeaf7b9fc1236002d54e1ec98c17278dacbc4a851f7eee71d"}}