CVE catalog

CVE-2025-26434

libxml2: CVE-2025-26434

Severity: Medium · CVSS 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Published: Sep 5, 2025, 4:10:02 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.08% · Oct 25, 2026

In libxml2, there is a possible out of bounds read due to a buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

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	libxml2	sid	`2.15.4+dfsg-1`	not affected
Debian	libxml2	forky	`2.15.4+dfsg-1`	not affected
Debian	libxml2	trixie	`2.12.7+dfsg+really2.9.14-2.1+deb13u3`	not affected
Debian	libxml2	trixie-security	`2.12.7+dfsg+really2.9.14-2.1+deb13u1`	not affected
Debian	libxml2	bookworm	`2.9.14+dfsg-1.3~deb12u6`	not affected
Debian	libxml2	bookworm-security	`2.9.14+dfsg-1.3~deb12u4`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libxml2	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	libxml2	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	libxml2	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	libxml2	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libxml2]Not affected
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
[libxml2-dev]Not affected
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
[libxml2-doc]Not affected
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
[libxml2-utils]Not affected
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
[python3-libxml2]Not affected
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Not affected
  dsa · libxml2 · debian · bookworm

Observed: Oct 27, 2026, 11:52:14 AM UTC

References

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