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Ubuntu 25.04: libxml2 Critical Denial of Service USN-7743-1 CVE-2025-9714

ubuntu
Calendar Grey September 10, 2025
Dist Ubuntu Esm H88
An urgent necessity for updates arises due to a denial of service vulnerability in libxml2, impacting multiple versions of Ubuntu.
libxml2 could be made to crash if it received specially crafted input.

Summary

libxml2 could be made to crash if it received specially crafted

input.

Software Description:

- libxml2: GNOME XML library

Details:

Nikita Sveshnikov discovered that libxml2 incorrectly handled recursion

when processing XPath expressions. An attacker could possibly use this

issue to cause a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libxml2 XPath

Update Instructions

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

Ubuntu 25.04
  libxml2                         2.12.7+dfsg+really2.9.14-0.4ubuntu0.3
  libxml2-dev                     2.12.7+dfsg+really2.9.14-0.4ubuntu0.3
  libxml2-utils                   2.12.7+dfsg+really2.9.14-0.4ubuntu0.3

Ubuntu 24.04 LTS
  libxml2                         2.9.14+dfsg-1.3ubuntu3.5
  libxml2-dev                     2.9.14+dfsg-1.3ubuntu3.5
  libxml2-utils                   2.9.14+dfsg-1.3ubuntu3.5

Ubuntu 22.04 LTS
  libxml2                         2.9.13+dfsg-1ubuntu0.9
  libxml2-dev                     2.9.13+dfsg-1ubuntu0.9
  libxml2-utils                   2.9.13+dfsg-1ubuntu0.9

Ubuntu 20.04 LTS
  libxml2                         2.9.10+dfsg-5ubuntu0.20.04.10+esm2
                                  Available with Ubuntu Pro
  libxml2-dev                     2.9.10+dfsg-5ubuntu0.20.04.10+esm2
                                  Available with Ubuntu Pro
  libxml2-utils                   2.9.10+dfsg-5ubuntu0.20.04.10+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libxml2                         2.9.4+dfsg1-6.1ubuntu1.9+esm5
                                  Available with Ubuntu Pro
  libxml2-dev                     2.9.4+dfsg1-6.1ubuntu1.9+esm5
                                  Available with Ubuntu Pro
  libxml2-utils                   2.9.4+dfsg1-6.1ubuntu1.9+esm5
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libxml2                         2.9.3+dfsg1-1ubuntu0.7+esm10
                                  Available with Ubuntu Pro
  libxml2-dev                     2.9.3+dfsg1-1ubuntu0.7+esm10
                                  Available with Ubuntu Pro
  libxml2-utils                   2.9.3+dfsg1-1ubuntu0.7+esm10
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libxml2                         2.9.1+dfsg1-3ubuntu4.13+esm9
                                  Available with Ubuntu Pro
  libxml2-dev                     2.9.1+dfsg1-3ubuntu4.13+esm9
                                  Available with Ubuntu Pro
  libxml2-utils                   2.9.1+dfsg1-3ubuntu4.13+esm9
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-7743-1

CVE-2025-9714

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7743-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libxml2 XPath

Package Information

https://launchpad.net/ubuntu/+source/libxml2/2.12.7+dfsg+really2.9.14-0.4ubuntu0.3
https://launchpad.net/ubuntu/+source/libxml2/2.9.14+dfsg-1.3ubuntu3.5
https://launchpad.net/ubuntu/+source/libxml2/2.9.13+dfsg-1ubuntu0.9

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