CVE-2025-48172CWE-190

CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow

Medium · published July 4, 2025

CVSS v3.1
5.6
EPSS
0%
Percentile
7.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.6 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00183 · 7.4th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2025-07-04T00:00Z
EPSS history
Timeline
  • 04 JUL 00:00Z
    CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow
    cvelistv5