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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| libyal | libfvde | ≤ 20260923 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libfvde | No fix yet | — |
| Ubuntu 26.04 LTS | libfvde | No fix yet | — |
| Ubuntu 24.04 LTS | libfvde | No fix yet | — |
| Ubuntu 22.04 LTS | libfvde | No fix yet | — |
| Ubuntu 20.04 LTS | libfvde | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libfvde | No fix yet | — |
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