CVE-2025-49796

Publication date 16 June 2025

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libxml2	25.04 plucky	Fixed 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 2.9.14+dfsg-1.3ubuntu3.4
	22.04 LTS jammy	Fixed 2.9.13+dfsg-1ubuntu0.8
	20.04 LTS focal	Fixed 2.9.10+dfsg-5ubuntu0.20.04.10+esm1
	18.04 LTS bionic	Fixed 2.9.4+dfsg1-6.1ubuntu1.9+esm4
	16.04 LTS xenial	Fixed 2.9.3+dfsg1-1ubuntu0.7+esm9
	14.04 LTS trusty	Fixed 2.9.1+dfsg1-3ubuntu4.13+esm8

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libxml2	Upstream: 81cef8c

Severity score breakdown

Parameter	Value
Base score	9.1 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7694-1
libxml2 vulnerabilities
14 August 2025