{"id":"CVE-2026-80674","title":"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 pat…","summary":"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 pat…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","published":"2026-08-28","updated":"2026-08-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80674","references":[{"url":"https://git.kernel.org/stable/c/55e97648f7753c6097cb682d24d1abcfe878e812","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7d19e1ffee084c4f7d321a360c14ba43404f7cc8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00379,"epssPercentile":0.31825,"ingestedAt":"2026-08-30T04:47:10.206Z","slug":"CVE-2026-80674","body":"## Overview\n\nIn 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->attr_list with a plain memcpy() and no validation\nat all. Every subsequent walk of ni->attr_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->name_offset (offset 7),\nale->mft_reference (offset 16) and the name length under only an\n\"al < 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->length 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}