{"apiVersion":"1.0","identifier":"CVE-2026-80673","description":"In the Linux kernel, the following vulnerability has been resolved: ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find() When resolving an attribute lookup with a non-zero @lowest_vcn, ntfs_external_attr_find() peeks at the next $ATTRIBUTE_LIST entry to decide whether to keep searching, but bounds that not-yet-validated entry only with -(u8 *)next_al_entry + 6 < al_end- (which proves just bytes 0..6 are in range) and -(u8 *)next_al_entry + length <= al_end- with an attacker-controlled, non-8-aligned length. It then reads next_al_entry->lowest_vcn (an __le64 at offset 8) and the name at next_al_entry->name_offset, both of which can lie past al_end -- the exact end of the kvmalloc-d attribute-list buffer (allocated at the on-disk attr_list_size, no rounding). A crafted on-disk $ATTRIBUTE_LIST whose last entry sits a few bytes before al_end therefore yields a slab out-of-bounds read when the inode is read. Validate the look-ahead entry with ntfs_attr_list_entry_is_valid() (added in patch 1/3) before dereferencing lowest_vcn and the name, so the same fixed-header, length and name bounds the main attribute-list walk uses now guard this read too.","publishedAt":"2026-08-28T08:16:52","lastModifiedAt":"2026-08-28T08:16:52","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80673","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00155,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80673","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80673","en":"https://www.redsauce.net/en/cves/CVE-2026-80673","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80673","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80673","de":"https://www.redsauce.net/de/cves/CVE-2026-80673","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80673","el":"https://www.redsauce.net/el/cves/CVE-2026-80673"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80673"}}