CVE-2026-116737
libphdi through 20260902 Heap Out-of-Bounds Read via Extent Data File Path
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| libphdi libyal libyal/libphdi
github |
≥ 0; ≤ 20260902 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 6.1 medium |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H | CNA: VulnCheck |
Exploit evidence
- https://hackmd.io/@haindpwn/cve-2026-116737-libphdi-extent-data-file-path-heap-oob-read
exploit · ADP: CISA-ADP
References
- https://github.com/libyal/libphdi/issues/6CNA: VulnCheck · issue-tracking
- https://github.com/libyal/libphdiCNA: VulnCheck · product
- https://github.com/libyal/libphdi/commit/61e3e1f6b4c5e15ce827b11858ba51f0dba254e3CNA: VulnCheck · patch
- https://github.com/libyal/libphdi/blob/20260902/libphdi/libphdi_data_files.c#L890-L907CNA: VulnCheck · technical-description
- https://hackmd.io/@haindpwn/libphdi-extent-data-file-path-heap-oob-readCNA: VulnCheck · third-party-advisory
- https://www.vulncheck.com/advisories/libphdi-through-20260902-heap-out-of-bounds-read-via-extent-data-file-pathCNA: VulnCheck · third-party-advisory
- https://hackmd.io/@haindpwn/cve-2026-116737-libphdi-extent-data-file-path-heap-oob-readADP: CISA-ADP · exploit
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