CVE catalog

CVE-2025-49795

libxml2: CVE-2025-49795

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jun 11, 2025, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.59% · Oct 25, 2026

A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.

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
Alpine	libxml2	3.21	`2.13.9-r0`	fixed
Alpine	libxml2	3.22	`2.13.9-r0`	fixed
Alpine	libxml2	3.23	`2.13.9-r0`	fixed
Alpine	libxml2	3.24	`2.13.9-r0`	fixed
Ubuntu	libxml2	25.10	`2.12.7+dfsg+really2.9.14-0.4`	vulnerable
Ubuntu	libxml2	25.10	`2.12.7+dfsg+really2.9.14-0.4ubuntu0.1`	vulnerable
Ubuntu	libxml2	25.10	`2.12.7+dfsg+really2.9.14-1`	vulnerable
Ubuntu	libxml2	25.10	`2.14.3+dfsg-0exp1`	vulnerable
Ubuntu	libxml2	25.10	`2.14.3+dfsg-0exp2`	vulnerable
Ubuntu	libxml2	25.10	`2.14.3+dfsg-0exp3`	vulnerable
Ubuntu	libxml2	25.10	`2.14.4+dfsg-0exp1`	vulnerable
Ubuntu	libxml2	25.10	`2.14.5+dfsg-0exp1`	vulnerable
Ubuntu	libxml2	25.10	`2.14.5+dfsg-0exp2`	vulnerable
Ubuntu	libxml2	25.10	`2.14.5+dfsg-0.1`	vulnerable
Ubuntu	libxml2	25.10	`2.14.5+dfsg-0.2`	fixed

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
Alpine	libxml2	apk	3.21	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49795	Not reported
Alpine	libxml2	apk	3.22	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49795	Not reported
Alpine	libxml2	apk	3.23	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49795	Not reported
Alpine	libxml2	apk	3.24	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49795	Not reported
Ubuntu	libxml2	deb	25.10	`2.14.5+dfsg-0.2`	Not reported	UBUNTU-CVE-2025-49795	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, 1:44:31 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]