{"cve":"CVE-2026-80673","nvd":{"published":"2026-08-28T08:16:52.607","modified":"2026-08-29T07:16:49.730","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()\n\nWhen resolving an attribute lookup with a non-zero @lowest_vcn,\nntfs_external_attr_find() peeks at the next $ATTRIBUTE_LIST entry to\ndecide whether to keep searching, but bounds that not-yet-validated\nentry only with \"(u8 *)next_al_entry + 6 < al_end\" (which proves just\nbytes 0..6 are in range) and \"(u8 *)next_al_entry + length <= al_end\"\nwith an attacker-controlled, non-8-aligned length. It then reads\nnext_al_entry->lowest_vcn (an __le64 at offset 8) and the name at\nnext_al_entry->name_offset, both of which can lie past al_end -- the\nexact end of the kvmalloc'd attribute-list buffer (allocated at the\non-disk attr_list_size, no rounding). A crafted on-disk $ATTRIBUTE_LIST\nwhose last entry sits a few bytes before al_end therefore yields a slab\nout-of-bounds read when the inode is read.\n\nValidate the look-ahead entry with ntfs_attr_list_entry_is_valid() (added\nin patch 1/3) before dereferencing lowest_vcn and the name, so the same\nfixed-header, length and name bounds the main attribute-list walk uses now\nguard this read too.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://git.kernel.org/stable/c/344b18f389f9934d59c7b0cf3d20541ea2e0da58","https://git.kernel.org/stable/c/44885c9b45eb4082fb7f558590d84bb254a08e94"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80673","score":0.00553,"percentile":0.46224,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}