Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck
CVE-2026-116737libphdi through 20260902 Heap Out-of-Bounds Read via Extent Data File Path
Medium 6.1
In plain English
A medium-severity security flaw in libphdi 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 2% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.1%top 97.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
libphdi through 20260902 contains a heap out-of-bounds read vulnerability in libphdi_data_files_get_extent_data_file_path that uses the directory prefix length instead of the basename length. Attackers can supply a crafted Parallels disk image descriptor with a long directory prefix and short basename to crash the process or expose adjacent heap memory.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:26.04:LTS | libphdi | no fix listed | UBUNTU-CVE-2026-116737 |
| Ubuntu:26.10 | libphdi | no fix listed | UBUNTU-CVE-2026-116737 |
Affected products (as reported)
Weakness: CWE-131 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- GitHub Issue #6 issue-tracking
- https://github.com/libyal/libphdi product
- https://github.com/libyal/libphdi/commit/61e3e1f6b4c5e15ce827b11858ba51f0dba254e3 patch
- https://github.com/libyal/libphdi/blob/20260902/libphdi/libphdi_data_files.c#L890-L907 technical-description
- https://hackmd.io/@haindpwn/libphdi-extent-data-file-path-heap-oob-read third-party-advisory
- VulnCheck Advisory: libphdi through 20260902 Heap Out-of-Bounds Read via Extent Data File Path third-party-advisory
- https://hackmd.io/@haindpwn/cve-2026-116737-libphdi-extent-data-file-path-heap-oob-read exploit