CVE-2025-48172

MEDIUM EPSS 4.9%
Published Jul 4, 202512mo ago · Modified Jun 17, 20262w ago
5.6 CVSS 3.1
Medium
Find Similar
Published Jul 4, 2025 12mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.6
Exploitability
1.4
Impact
3.7
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
4.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

References 4

  • drive.google.com https://drive.google.com/file/d/1XpulFyCGlq7Szzg5RsH-eRwZ6OyuSozl/view?usp=sharing
  • drive.google.com https://drive.google.com/file/d/1wq51px42eoJz2VQ1Qu9ObPVQVom9T9H_/view?usp=sharing
  • github.com https://github.com/jedwing/CHMLib/blob/2bef8d063ec7d88a8de6fd9f0513ea42ac0fa21f/src/chm_lib.c#L1386
  • github.com https://github.com/sumatrapdfreader/sumatrapdf/commit/08179946a745cf1605e4b9670942ec1a6e1f4c5d

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.