CVE catalog

CVE-2025-49796

libxml2 vulnerabilities

Severity: Critical · CVSS 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published: Jun 11, 2025, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.56% · Oct 25, 2026

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.

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`	fixed
Debian	libxml2	forky	`2.15.4+dfsg-1`	fixed
Debian	libxml2	trixie	`2.12.7+dfsg+really2.9.14-2.1+deb13u3`	fixed
Debian	libxml2	trixie-security	`2.12.7+dfsg+really2.9.14-2.1+deb13u1`	fixed
Debian	libxml2	bookworm	`2.9.14+dfsg-1.3~deb12u6`	fixed
Debian	libxml2	bookworm-security	`2.9.14+dfsg-1.3~deb12u4`	fixed
Ubuntu	libxml2	noble	`2.9.14+dfsg-1.3~deb12u3`	fixed
Ubuntu	libxml2	noble	`2.9.14+dfsg-1.3ubuntu3.4`	fixed
Ubuntu	libxml2-dev	noble	`2.9.14+dfsg-1.3ubuntu3.4`	fixed
Ubuntu	libxml2-doc	noble	`2.9.14+dfsg-1.3ubuntu3.4`	fixed
Ubuntu	libxml2-utils	noble	`2.9.14+dfsg-1.3ubuntu3.4`	fixed
Ubuntu	python3-libxml2	noble	`2.9.14+dfsg-1.3ubuntu3.4`	fixed
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	pro	`2.9.4+dfsg1-7ubuntu3`	vulnerable
Ubuntu	libxml2	pro	`2.9.4+dfsg1-7ubuntu5`	vulnerable
Ubuntu	libxml2	pro	`2.9.4+dfsg1-8ubuntu1`	vulnerable
Ubuntu	libxml2	pro	`2.9.4+dfsg1-8ubuntu2`	vulnerable
Ubuntu	libxml2	pro	`2.9.4+dfsg1-8ubuntu3`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-1ubuntu3`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-4build1`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.1`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.2`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.3`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.4`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.5`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.6`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.7`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.8`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.9`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.10`	vulnerable
Ubuntu	libxml2	pro	`2.9.10+dfsg-5ubuntu0.20.04.10+esm1`	fixed
Ubuntu	libxml2	22.04	`2.9.12+dfsg-4`	vulnerable
Ubuntu	libxml2	22.04	`2.9.12+dfsg-5`	vulnerable
Ubuntu	libxml2	22.04	`2.9.12+dfsg-6`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1build1`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.1`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.2`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.3`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.4`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.5`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.6`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.7`	vulnerable
Ubuntu	libxml2	22.04	`2.9.13+dfsg-1ubuntu0.8`	fixed
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3build1`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3build2`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3build3`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu1`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu2`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu3`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu3.1`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu3.2`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu3.3`	vulnerable
Ubuntu	libxml2	24.04	`2.9.14+dfsg-1.3ubuntu3.4`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libxml2	source	sid	`2.12.7+dfsg+really2.9.14-2`	not yet assigned	Not reported	[1107752]
Debian	libxml2	source	forky	`2.12.7+dfsg+really2.9.14-2`	not yet assigned	Not reported	[1107752]
Debian	libxml2	source	trixie	`2.12.7+dfsg+really2.9.14-2`	not yet assigned	Not reported	[1107752]
Debian	libxml2	source	bookworm	`2.9.14+dfsg-1.3~deb12u3`	not yet assigned	Not reported	[1107752]
Ubuntu	libxml2	deb	noble	`2.9.14+dfsg-1.3~deb12u3`	Not reported	Not reported	Not reported
Ubuntu	libxml2	deb	noble	`2.9.14+dfsg-1.3ubuntu3.4`	Not reported	Not reported	Not reported
Ubuntu	libxml2-dev	deb	noble	`2.9.14+dfsg-1.3ubuntu3.4`	Not reported	Not reported	Not reported
Ubuntu	libxml2-doc	deb	noble	`2.9.14+dfsg-1.3ubuntu3.4`	Not reported	Not reported	Not reported
Ubuntu	libxml2-utils	deb	noble	`2.9.14+dfsg-1.3ubuntu3.4`	Not reported	Not reported	Not reported
Ubuntu	python3-libxml2	deb	noble	`2.9.14+dfsg-1.3ubuntu3.4`	Not reported	Not reported	Not reported
Alpine	libxml2	apk	3.21	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49796	Not reported
Alpine	libxml2	apk	3.22	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49796	Not reported
Alpine	libxml2	apk	3.23	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49796	Not reported
Alpine	libxml2	apk	3.24	`2.13.9-r0`	Not reported	ALPINE-CVE-2025-49796	Not reported
Ubuntu	libxml2	deb	pro	`2.9.10+dfsg-5ubuntu0.20.04.10+esm1`	Not reported	UBUNTU-CVE-2025-49796	Not reported
Ubuntu	libxml2	deb	22.04	`2.9.13+dfsg-1ubuntu0.8`	Not reported	UBUNTU-CVE-2025-49796	Not reported
Ubuntu	libxml2	deb	24.04	`2.9.14+dfsg-1.3ubuntu3.4`	Not reported	UBUNTU-CVE-2025-49796	Not reported

[Debian bug #1107752]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libxml2]Fixed
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
[libxml2-dev]Fixed
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
[libxml2-doc]Fixed
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
[libxml2-utils]Fixed
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
[python3-libxml2]Fixed
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.14+dfsg-1.3~deb12u3
  usn · libxml2 · debian · bookworm; usn · libxml2 · debian · 12

[Debian 13 (Trixie)]

[libxml2]Fixed
Details (4)
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
[libxml2-dev]Fixed
Source package: [libxml2]
Details (4)
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
[libxml2-doc]Fixed
Source package: [libxml2]
Details (4)
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · all · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · all · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
[libxml2-utils]Fixed
Source package: [libxml2]
Details (4)
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
[python3-libxml2]Fixed
Source package: [libxml2]
Details (4)
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13
- 2.12.7+dfsg+really2.9.14-2.1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.12.7+dfsg+really2.9.14-2
  usn · libxml2 · debian · 13

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] · [Ubuntu Security Notices (USN)]