{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1e9ea7e04472d4e5e12e58c881eaacfb3e49b669"
            },
            {
              "fixed": "55e97648f7753c6097cb682d24d1abcfe878e812"
            },
            {
              "fixed": "7d19e1ffee084c4f7d321a360c14ba43404f7cc8"
            }
          ],
          "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-2026-80674.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: validate resident attribute lists and harden the validator\n\nA base inode's $ATTRIBUTE_LIST is sanity-checked by load_attribute_list()\nonly on the non-resident path; ntfs_read_locked_inode() copies a *resident*\nattribute list into ni-\u003eattr_list with a plain memcpy() and no validation\nat all. Every subsequent walk of ni-\u003eattr_list --\nntfs_external_attr_find(), ntfs_inode_attach_all_extents() and\nntfs_attrlist_need() -- then trusts the entries are well-formed and reads\nattr_list_entry fixed-header fields\n(lowest_vcn at offset 8, mft_reference at offset 16, and the name) with\nbounds that assume validation already happened. A crafted resident\nattribute list therefore reaches those walks unvalidated and can drive\nout-of-bounds reads of the attribute-list buffer.\n\nload_attribute_list() itself reads ale-\u003ename_offset (offset 7),\nale-\u003emft_reference (offset 16) and the name length under only an\n\"al \u003c al_start + size\" bound, so its own validation loop can over-read the\nfixed header of a truncated trailing entry by a few bytes.\n\nFactor the per-entry validation into ntfs_attr_list_entry_is_valid(),\nwhich requires each entry's fixed header (offsetof(struct\nattr_list_entry, name)) to be in range before any field is dereferenced,\nthat ale-\u003elength is a multiple of 8 covering the fixed header plus the\nname, and that the entry is in use and carries a live MFT reference.\nntfs_attr_list_is_valid() walks the buffer with it and checks the entries\ntile it exactly. Use the list validator in load_attribute_list()\n(replacing the open-coded loop, closing its own over-read) and on the\nresident path in ntfs_read_locked_inode() (which previously skipped\nvalidation entirely); patches 2/3 reuse the per-entry helper at the other\ntwo attribute-list walks.",
  "id": "CVE-2026-80674",
  "modified": "2026-08-31T03:30:43.845305933Z",
  "published": "2026-08-28T06:49:13.549Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55e97648f7753c6097cb682d24d1abcfe878e812"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d19e1ffee084c4f7d321a360c14ba43404f7cc8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80674.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80674"
    },
    {
      "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: validate resident attribute lists and harden the validator"
}