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Ubuntu 25.04: Critical DoS Vulnerability in libxml2 - CVE-2025-7425

ubuntu
Calendar Grey October 30, 2025
Dist Ubuntu Esm H88
libxml2 on Ubuntu affects multiple versions with a critical exploit causing Denial of Service. Update recommended.
libxml2 could be made to crash or run programs if it opened a specially crafted file.

Summary

libxml2 could be made to crash or run programs if it opened a specially

crafted file.

Software Description:

- libxml2: GNOME XML library

Details:

It was discovered that libxslt, used by libxml2, incorrectly handled

certain attributes. An attacker could use this issue to cause a crash,

resulting in a denial of service, or possibly execute arbitrary code. This

update adds a fix to libxml2 to mitigate the libxslt vulnerability.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libxml2 cve-2025-7425

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.04
  libxml2                         2.12.7+dfsg+really2.9.14-0.4ubuntu0.4
  python3-libxml2                 2.12.7+dfsg+really2.9.14-0.4ubuntu0.4

Ubuntu 24.04 LTS
  libxml2                         2.9.14+dfsg-1.3ubuntu3.6
  python3-libxml2                 2.9.14+dfsg-1.3ubuntu3.6

Ubuntu 22.04 LTS
  libxml2                         2.9.13+dfsg-1ubuntu0.10
  python3-libxml2                 2.9.13+dfsg-1ubuntu0.10

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7852-1

CVE-2025-7425

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7852-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libxml2 cve-2025-7425

Package Information

https://launchpad.net/ubuntu/+source/libxml2/2.12.7+dfsg+really2.9.14-0.4ubuntu0.4
https://launchpad.net/ubuntu/+source/libxml2/2.9.14+dfsg-1.3ubuntu3.6
https://launchpad.net/ubuntu/+source/libxml2/2.9.13+dfsg-1ubuntu0.10

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