CVE catalog

CVE-2025-48172

chmlib: CVE-2025-48172

Severity: High · CVSS 7CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: Jul 9, 2025, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.18% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	chmlib	sid	`2:0.40a-9`	not affected
Debian	chmlib	forky	`2:0.40a-9`	not affected
Debian	chmlib	trixie	`2:0.40a-8.1`	not affected
Debian	chmlib	bookworm	`2:0.40a-8`	not affected
Opensuse	chmlib	tumbleweed	`0.40-26.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	chmlib	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	chmlib	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	chmlib	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	chmlib	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Opensuse	chmlib	rpm	tumbleweed	`0.40-26.1`	Not reported	OPENSUSE-SU-2025:15326-1	Not reported

OpenFactory catalog packages

[openSUSE Tumbleweed]

[chmlib-devel]Unknown
Source package: [chmlib]
Details (1)
- 0.40-26.5 · x86_64 · tumbleweed
  Unknown · Fixed: 0.40-26.1
  Version impact unknown
  dsa · chmlib · opensuse · tumbleweed
[chmlib-examples]Unknown
Source package: [chmlib]
Details (1)
- 0.40-26.5 · x86_64 · tumbleweed
  Unknown · Fixed: 0.40-26.1
  Version impact unknown
  dsa · chmlib · opensuse · tumbleweed
[libchm0]Unknown
Source package: [chmlib]
Details (1)
- 0.40-26.5 · x86_64 · tumbleweed
  Unknown · Fixed: 0.40-26.1
  Version impact unknown
  dsa · chmlib · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[libchm1]Not affected
Source package: [chmlib]
Details (2)
- 2:0.40a-8 · amd64 · bookworm
  Not affected
  dsa · chmlib · debian · bookworm
- 2:0.40a-8 · arm64 · bookworm
  Not affected
  dsa · chmlib · debian · bookworm
[libchm-bin]Not affected
Source package: [chmlib]
Details (2)
- 2:0.40a-8 · amd64 · bookworm
  Not affected
  dsa · chmlib · debian · bookworm
- 2:0.40a-8 · arm64 · bookworm
  Not affected
  dsa · chmlib · debian · bookworm
[libchm-dev]Not affected
Source package: [chmlib]
Details (2)
- 2:0.40a-8 · amd64 · bookworm
  Not affected
  dsa · chmlib · debian · bookworm
- 2:0.40a-8 · arm64 · bookworm
  Not affected
  dsa · chmlib · debian · bookworm

Observed: Oct 24, 2026, 9:10:11 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]