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Ubuntu 20.04 LTS: python-apt Important Denial of Service Fix USN-7916-2

ubuntu
Calendar Grey January 16, 2026
Dist Ubuntu Esm H88
Fix for a regression affecting python-apt in Ubuntu 20.04 LTS. Important update addressing denial of service.
USN-7916-1 introduced a regression in python-apt

Summary

USN-7916-1 introduced a regression in python-apt

Software Description:

- python-apt: Python interface to libapt-pkg

Details:

USN-7916-1 fixed a vulnerability in python-apt. The update had a

PEP 440 incompatible version. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Julian Andres Klode discovered that python-apt incorrectly handled

deb822 configuration files. An attacker could use this issue to cause

python-apt to crash, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important regression python-apt

Update Instructions

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

Ubuntu 20.04 LTS
  python-apt                      2.0.1ubuntu0.20.04.2esm2
                                  Available with Ubuntu Pro
  python-apt-common               2.0.1ubuntu0.20.04.2esm2
                                  Available with Ubuntu Pro
  python-apt-dev                  2.0.1ubuntu0.20.04.2esm2
                                  Available with Ubuntu Pro
  python-apt-doc                  2.0.1ubuntu0.20.04.2esm2
                                  Available with Ubuntu Pro
  python3-apt                     2.0.1ubuntu0.20.04.2esm2
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-7916-2

https://ubuntu.com/security/notices/USN-7916-1

CVE-2025-6966, https://bugs.launchpad.net/bugs/2137070

Severity
important
Lowest
Low
Medium
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Critical

Ubuntu Security Notice USN-7916-2

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important regression python-apt

Package Information

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