{"api_version":"1","generated_at":"2026-09-25T12:39:46+00:00","cve":"CVE-2026-98136","urls":{"html":"https://cve.report/CVE-2026-98136","api":"https://cve.report/api/cve/CVE-2026-98136.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98136","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98136"},"summary":{"title":"ntfs: bound $AttrDef table walk to the loaded table size","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:45","updated_at":"2026-09-25 11:17:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3e2ae47b8ebc632c27e7843a4632d9a7c060885e","name":"https://git.kernel.org/stable/c/3e2ae47b8ebc632c27e7843a4632d9a7c060885e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c8504fc1245f5322af5fa5c325ab05f9cf792b87","name":"https://git.kernel.org/stable/c/c8504fc1245f5322af5fa5c325ab05f9cf792b87","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98136","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98136","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 3e2ae47b8ebc632c27e7843a4632d9a7c060885e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 c8504fc1245f5322af5fa5c325ab05f9cf792b87 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ntfs/attrib.c","fs/ntfs/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3e2ae47b8ebc632c27e7843a4632d9a7c060885e","status":"affected","version":"1e9ea7e04472d4e5e12e58c881eaacfb3e49b669","versionType":"git"},{"lessThan":"c8504fc1245f5322af5fa5c325ab05f9cf792b87","status":"affected","version":"1e9ea7e04472d4e5e12e58c881eaacfb3e49b669","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ntfs/attrib.c","fs/ntfs/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.1"},{"lessThan":"7.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"7.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc2","versionStartIncluding":"7.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-25T10:36:14.106Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3e2ae47b8ebc632c27e7843a4632d9a7c060885e"},{"url":"https://git.kernel.org/stable/c/c8504fc1245f5322af5fa5c325ab05f9cf792b87"}],"title":"ntfs: bound $AttrDef table walk to the loaded table size","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98136","datePublished":"2026-09-25T10:36:14.106Z","dateReserved":"2026-09-25T10:25:14.319Z","dateUpdated":"2026-09-25T10:36:14.106Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:45","lastModifiedDate":"2026-09-25 11:17:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98136","Ordinal":"1","Title":"ntfs: bound $AttrDef table walk to the loaded table size","CVE":"CVE-2026-98136","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98136","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ntfs: bound $AttrDef table walk to the loaded table size"}]}}}