CVE-2026-110598: Out-of-bounds Read in libyal libpff
Description
Libyal libpff through 20260926 contains an integer underflow in libpff_record_entry_get_multi_value() that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets. Attackers can craft PST, OST or PAB files with decreasing PT_MV_STRING8, PT_MV_UNICODE or PT_MV_BINARY offsets to crash libpff, pypff or pffexport and expose adjacent heap memory.
CVSS v4.0
Score 6.9medium
Affected software
libyal
libpff
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Libyal libpff versions up to 0 contain an integer underflow in the function libpff_record_entry_get_multi_value(). This flaw allows attackers to craft PST, OST, or PAB files with decreasing PT_MV_STRING8, PT_MV_UNICODE, or PT_MV_BINARY offsets, triggering heap out-of-bounds reads. The vulnerability can cause applications using libpff, such as pypff or pffexport, to crash and potentially leak adjacent heap memory.
Potential Impact
Successful exploitation can lead to application crashes and exposure of adjacent heap memory, which may result in information disclosure. The CVSS 4.0 score is 6.9 (medium severity), indicating a moderate impact with local attack vector, low complexity, no privileges required, and user interaction needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-14T13:07:19.518Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acf92e92cdf04f6568a2e19
Added to database: 10/14/2026, 14:34:17 UTC
Last enriched: 10/14/2026, 15:18:47 UTC
Last updated: 10/14/2026, 19:00:32 UTC
Views: 9
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