CVE-2026-111133
mediumlibfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads v…
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/libyal/libfsapfs disclosure@vulncheck.com
- https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0b34b8a47f1f1562d27bbb/libfsapf... disclosure@vulncheck.com
- https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0b34b8a47f1f1562d27bbb/libfsapf... disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/libfsapfs-key-encrypted-key-attribute-oob-read disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/libfsapfs-through-20260921-heap-out-of-bounds-read-vi... disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/libfsapfs-key-encrypted-key-attribute-oob-read 134c704f-9b21-4f2e-91b3-4a467353bcc0