{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1e9ea7e04472d4e5e12e58c881eaacfb3e49b669"
            },
            {
              "fixed": "44885c9b45eb4082fb7f558590d84bb254a08e94"
            },
            {
              "fixed": "344b18f389f9934d59c7b0cf3d20541ea2e0da58"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80673.json"
  },
  "details": "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 \u003c al_end\" (which proves just\nbytes 0..6 are in range) and \"(u8 *)next_al_entry + length \u003c= al_end\"\nwith an attacker-controlled, non-8-aligned length. It then reads\nnext_al_entry-\u003elowest_vcn (an __le64 at offset 8) and the name at\nnext_al_entry-\u003ename_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.",
  "id": "CVE-2026-80673",
  "modified": "2026-08-31T03:30:59.384593142Z",
  "published": "2026-08-28T06:49:12.951Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/344b18f389f9934d59c7b0cf3d20541ea2e0da58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44885c9b45eb4082fb7f558590d84bb254a08e94"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80673.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80673"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()"
}