CVE-2025-48172
Medium
Description
CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow. There is a resultant heap-based buffer overflow in _chm_fetch_bytes.
SeverityMedium
CVSS5.6
Exploit probability—
ProductCHMLib
PublishedJul 4, 2025
First seenJul 4, 2025
Weakness typeCWE-190Integer overflow
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CHMLib CHMLib | v ≤ 2bef8d063ec7d88a8de6fd9f0513ea42ac0fa21f | — |
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