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Ubuntu 20.04 LTS: libxml2 Denial of Service Fix USN-7852-2 CVE-2025-7425

ubuntu
Calendar Grey November 27, 2025
Dist Ubuntu Esm H88
libxml2 update for Ubuntu addresses a potential crash or executing malicious code vulnerability, ensuring system safety.
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:

USN-7582-1 fixed a vulnerability in libxml2. This update provides the

corresponding fix for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and

Ubuntu 20.04 LTS.

Original advisory 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 Ubuntu update instructions software issue libxml2

Update Instructions

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

Ubuntu 20.04 LTS
  libxml2                         2.9.10+dfsg-5ubuntu0.20.04.10+esm3
                                  Available with Ubuntu Pro
  python-libxml2                  2.9.10+dfsg-5ubuntu0.20.04.10+esm3
                                  Available with Ubuntu Pro
  python3-libxml2                 2.9.10+dfsg-5ubuntu0.20.04.10+esm3
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libxml2                         2.9.4+dfsg1-6.1ubuntu1.9+esm6
                                  Available with Ubuntu Pro
  python-libxml2                  2.9.4+dfsg1-6.1ubuntu1.9+esm6
                                  Available with Ubuntu Pro
  python3-libxml2                 2.9.4+dfsg1-6.1ubuntu1.9+esm6
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libxml2                         2.9.3+dfsg1-1ubuntu0.7+esm11
                                  Available with Ubuntu Pro
  python-libxml2                  2.9.3+dfsg1-1ubuntu0.7+esm11
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-7852-2

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

CVE-2025-7425

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7852-2

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu update instructions software issue libxml2

Package Information

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