{"schema":"threatline.record/2","record":{"id":"CVE-2026-98136","aliases":[],"summary":"ntfs: bound $AttrDef table walk to the loaded table size","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: bound $AttrDef table walk to the loaded table size\n\nntfs_attr_find_in_attrdef() walks the in-memory $AttrDef table, but the\nloop condition bounds only the start of each entry, not the whole entry:\n\n\tfor (ad = vol->attrdef; (u8 *)ad - (u8 *)vol->attrdef <\n\t\t\tvol->attrdef_size && ad->type; ++ad)\n\nstruct attr_def is 160 bytes; the guard reads ad->type at offset 128 and\nthe loop body reads further fields. vol->attrdef is kvzalloc(i_size),\nwhere i_size is the on-disk $AttrDef data size, checked in\nload_and_init_attrdef() only as 0 < i_size <= 0x7fffffff. A volume whose\n$AttrDef data size is smaller than one entry (e.g. 120 bytes) makes the\nread of ad->type run past the allocation. Creating a file reaches this\nthrough ntfs_attr_size_bounds_check() and reads out of bounds:\n\n  BUG: KASAN: slab-out-of-bounds in ntfs_attr_find_in_attrdef+0x66/0xa0\n  Read of size 4 at addr ffff888005833280 by task init/1\n   ntfs_attr_find_in_attrdef\n   ntfs_attr_size_bounds_check\n   ntfs_attr_can_be_non_resident\n   ntfs_attr_add\n\nRequire the whole entry to lie within attrdef_size in the loop guard, and\nreject at mount a $AttrDef too small to hold one attr_def entry.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98136","source_modified_at":"2026-10-19T09:14:30.051Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"1e9ea7e04472d4e5e12e58c881eaacfb3e49b669","lessThan":"3e2ae47b8ebc632c27e7843a4632d9a7c060885e","status":"affected","versionType":"git"},{"version":"1e9ea7e04472d4e5e12e58c881eaacfb3e49b669","lessThan":"c8504fc1245f5322af5fa5c325ab05f9cf792b87","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98136","source_modified_at":"2026-10-19T09:14:30.051Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7.1","status":"affected"},{"version":"0","lessThan":"7.1","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-2026-98136","source_modified_at":"2026-10-19T09:14:30.051Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3e2ae47b8ebc632c27e7843a4632d9a7c060885e","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00109,"percentile":0.01196,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:36:14.106Z","modified_at":"2026-10-19T09:14:30.051Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98136","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:14:30.051Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98136","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/3e2ae47b8ebc632c27e7843a4632d9a7c060885e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c8504fc1245f5322af5fa5c325ab05f9cf792b87"}],"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":"2026-10-19T09:14:30.051Z","content_hash":"a64c8ed13c13cf29ba34728133f11a0110b4e9f58707c1925de6e91d6c67a20b"}}