CVE-2025-7425

Publication date 10 July 2025

Last updated 28 November 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

Description

A flaw was found in libxslt where the attribute type, atype, flags are modified in a way that corrupts internal memory management. When XSLT functions, such as the key() process, result in tree fragments, this corruption prevents the proper cleanup of ID attributes. As a result, the system may access freed memory, causing crashes or enabling attackers to trigger heap corruption.

Read the notes from the security team

Status

Package Ubuntu Release Status
libxslt 25.10 questing
Vulnerable, fix deferred
25.04 plucky
Vulnerable, fix deferred
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Vulnerable, fix deferred
22.04 LTS jammy
Vulnerable, fix deferred
20.04 LTS focal
Vulnerable, fix deferred
18.04 LTS bionic
Vulnerable, fix deferred
16.04 LTS xenial
Vulnerable, fix deferred
14.04 LTS trusty
Vulnerable, fix deferred
libxml2 25.10 questing
Not affected
25.04 plucky
Fixed 2.12.7+dfsg+really2.9.14-0.4ubuntu0.4
24.04 LTS noble
Fixed 2.9.14+dfsg-1.3ubuntu3.6
22.04 LTS jammy
Fixed 2.9.13+dfsg-1ubuntu0.10
20.04 LTS focal
Fixed 2.9.10+dfsg-5ubuntu0.20.04.10+esm3
18.04 LTS bionic
Fixed 2.9.4+dfsg1-6.1ubuntu1.9+esm6
16.04 LTS xenial
Fixed 2.9.3+dfsg1-1ubuntu0.7+esm11
14.04 LTS trusty
Fixed 2.9.1+dfsg1-3ubuntu4.13+esm10

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Notes

mdeslaur

as of 2025-11-12, the proposed fix for libxslt has not been merged yet, but there is a work-around in libxml2 available to address this issue, it should get fixed there also

Patch details

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

Package Patch details
libxml2

Severity score breakdown

Parameter Value
Base score 7.8 · High
Attack vector Local
Attack complexity High
Privileges required None
User interaction None
Scope Changed
Confidentiality None
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-7852-1
    • libxml2 vulnerability
    • 30 October 2025
    • USN-7852-2
    • libxml2 vulnerability
    • 27 November 2025
    • USN-7896-1
    • libxml2 vulnerabilities
    • 27 November 2025

Other references