Vulnerability · Published Oct 8, 2026 · Assigned by VulnCheck
CVE-2026-107634Dislocker through 0.7.3 Heap Out-of-Bounds Read via BitLocker Metadata Dataset Size
Medium 6.1
In plain English
A medium-severity out-of-bounds read in dislocker from Aorimn. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Dislocker through 0.7.3 contains a heap out-of-bounds read vulnerability in get_dataset() and get_next_datum() that never validate dataset and datum sizes against the metadata allocation. Attackers can craft a BitLocker volume image with inflated dataset or datum sizes that, when opened or mounted, crashes dislocker or discloses adjacent heap memory.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | dislocker | no fix listed | DEBIAN-CVE-2026-107634 |
| Debian:13 | dislocker | no fix listed | DEBIAN-CVE-2026-107634 |
| Debian:14 | dislocker | 0.7.4-1 | DEBIAN-CVE-2026-107634 |
| Ubuntu:22.04:LTS | dislocker | no fix listed | UBUNTU-CVE-2026-107634 |
| Ubuntu:24.04:LTS | dislocker | no fix listed | UBUNTU-CVE-2026-107634 |
| Ubuntu:26.04:LTS | dislocker | no fix listed | UBUNTU-CVE-2026-107634 |
| Ubuntu:26.10 | dislocker | no fix listed | UBUNTU-CVE-2026-107634 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- Patch Commit patch
- https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/metadata.c#L764-L790 technical-description
- https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/datums.c#L589-L640 technical-description
- https://github.com/Aorimn/dislocker product
- VulnCheck Advisory: Dislocker through 0.7.3 Heap Out-of-Bounds Read via BitLocker Metadata Dataset Size third-party-advisory