Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck
CVE-2026-116729libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001a
Low 3.3
In plain English
A low-severity out-of-bounds read in libfvde from libyal. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.1%top 97.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x001a() caused by an unbounded strlen on embedded XML plist data. Attackers can supply a crafted FileVault 2 volume with non-NUL-terminated plist data, causing libfvde_volume_open() to read past the heap block buffer.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | libfvde | no fix listed | UBUNTU-CVE-2026-116729 |
| Ubuntu:24.04:LTS | libfvde | no fix listed | UBUNTU-CVE-2026-116729 |
| Ubuntu:26.04:LTS | libfvde | no fix listed | UBUNTU-CVE-2026-116729 |
| Ubuntu:26.10 | libfvde | no fix listed | UBUNTU-CVE-2026-116729 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- GitHub Issue #70 issue-tracking
- https://github.com/libyal/libfvde product
- https://github.com/libyal/libfvde/commit/c2676fe49d0da44d66e7d750e72c57d2670f0b8f patch
- https://github.com/libyal/libfvde/blob/20260923/libfvde/libfvde_encrypted_metadata.c#L2786-L2792 technical-description
- https://hackmd.io/@haindpwn/libfvde-encrypted-metadata-oob-read third-party-advisory
- VulnCheck Advisory: libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001a third-party-advisory