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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/libyal/libphdi
disclosure@vulncheck.com
https://github.com/libyal/libphdi/blob/20260902/libphdi/libphdi_data_files.c#L8…
disclosure@vulncheck.com
https://github.com/libyal/libphdi/commit/61e3e1f6b4c5e15ce827b11858ba51f0dba254…
disclosure@vulncheck.com
https://github.com/libyal/libphdi/issues/6
disclosure@vulncheck.com
https://hackmd.io/@haindpwn/libphdi-extent-data-file-path-heap-oob-read
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/libphdi-through-20260902-heap-out-of-bound…
disclosure@vulncheck.com