Description
Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Aorimn | dislocker | ≤ 0.7.3 | — |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dislocker | 0.7.4-1 | — |
| Debian 13 | dislocker | No fix yet | — |
| Debian 12 | dislocker | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dislocker | No fix yet | — |
| Ubuntu 26.04 LTS | dislocker | No fix yet | — |
| Ubuntu 24.04 LTS | dislocker | No fix yet | — |
| Ubuntu 22.04 LTS | dislocker | No fix yet | — |
| Ubuntu 20.04 LTS | dislocker | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | dislocker | No fix yet | — |
References
- Patch Commit patch
- https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/vmk.c#L146-L180 technical-description
- https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/fvek.c#L90-L105 technical-description
- https://github.com/Aorimn/dislocker product
- VulnCheck Advisory: Dislocker through 0.7.3 Out-of-Bounds Heap Read via VMK/FVEK Datum Size Underflow third-party-advisory