CVE-2026-111133
CVE-2026-111133 · libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_data
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 6.9 · Medium · EPSS 0.2%
- Published
- Updated
Stack: system
Affected products and versions
libfsapfs
- Versions
- ≥ 0, ≤ 20260921: Affected (custom)
No fix published
libfsapfs Debian:12
- Versions
- 20201107-1
- 20201107-1+riscv64
- 20201107-1.1
- 20201107-1.1~exp1
- 20240429-1
- 20240429-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Debian:13
- Versions
- 20240429-1
- 20240429-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Debian:14
- Versions
- 20240429-1
- 20240429-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Ubuntu:20.04:LTS
- Versions
- 20190210-1
- 20190210-1build1
- 20190210-1ubuntu1
- 20190210-1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Ubuntu:22.04:LTS
- Versions
- 20201107-1
- 20201107-1build1
- 20201107-1build2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Ubuntu:24.04:LTS
- Versions
- 20201107-1build3
- 20201107-1build4
- 20201107-1.1
- 20201107-1.1build1
- 20201107-1.1build2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Ubuntu:26.10
- Versions
- 20240429-2ubuntu1
- 20240429-2ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libfsapfs Ubuntu:26.04:LTS
- Versions
- 20240429-1ubuntu1
- 20240429-2ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-111133