CVE-2025-48172

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.

Reserved 2025-05-16 | Published 2025-07-04 | Updated 2025-07-04 | Assigner mitre

Problem types

CWE-190 Integer Overflow or Wraparound

Product status

Default status
unknown

Any version
affected

References

drive.google.com/...q7Szzg5RsH-eRwZ6OyuSozl/view?usp=sharing

drive.google.com/...oJz2VQ1Qu9ObPVQVom9T9H_/view?usp=sharing

github.com/...3ec7d88a8de6fd9f0513ea42ac0fa21f/src/chm_lib.c

github.com/...ommit/08179946a745cf1605e4b9670942ec1a6e1f4c5d

cve.org (CVE-2025-48172)

nvd.nist.gov (CVE-2025-48172)

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