{"id":"CVE-2026-111133","state":"PUBLISHED","title":"libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_data","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","publishedAt":"2026-10-15T18:57:27.812Z","updatedAt":"2026-10-15T19:45:11.041Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["libyal libfsapfs"],"affected":[{"vendor":"libyal","product":"libfsapfs","packageURL":"pkg:github/libyal/libfsapfs","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"20260921","versionType":"custom"}],"collectionURL":"https://github.com","repo":"https://github.com/libyal/libfsapfs"}],"references":["https://hackmd.io/@haind-pwn/libfsapfs-key-encrypted-key-attribute-oob-read","https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0b34b8a47f1f1562d27bbb/libfsapfs/libfsapfs_key_encrypted_key.c#L321-L333","https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0b34b8a47f1f1562d27bbb/libfsapfs/libfsapfs_key_encrypted_key.c#L528-L540","https://github.com/libyal/libfsapfs","https://www.vulncheck.com/advisories/libfsapfs-through-20260921-heap-out-of-bounds-read-via-libfsapfs-key-encrypted-key-read-data"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111133.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111133","state":"PUBLISHED","datePublished":"2026-10-15T18:57:27.812Z","dateUpdated":"2026-10-15T19:45:11.041Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-15T17:03:54.047Z"},"containers":{"cna":{"title":"libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_data","descriptions":[{"lang":"en","value":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. 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