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Ubuntu 22.04 LTS Python Important IMAP POP3 Regression Fix USN-8018-2

ubuntu
Calendar Grey March 9, 2026
Dist Ubuntu Esm H88
Updates required for Ubuntu Python due to regression introduced by USN-8018-1 impacting IMAP and POP3 functionality.
USN-8018-1 introduced a regression in Python

Summary

USN-8018-1 introduced a regression in Python

Software Description:

- python3.13: An interactive high-level object-oriented language

- python3.14: An interactive high-level object-oriented language

- python3.12: An interactive high-level object-oriented language

- python3.10: An interactive high-level object-oriented language

- python3.11: An interactive high-level object-oriented language

- python3.8: An interactive high-level object-oriented language

- python3.9: An interactive high-level object-oriented language

- python3.6: An interactive high-level object-oriented language

- python3.7: An interactive high-level object-oriented language

- python3.5: An interactive high-level object-oriented language

- python3.4: An interactive high-level object-oriented language

Details:

USN-8018-1 fixed vulnerabilities in python3. That update introduced

regressions. The patches for CVE-2025-15366 and CVE-2025-15367 caused

behavior regressions in IMAP and POP3 handling, which upstream chose...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important python regression

Update Instructions

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

Ubuntu 25.10
  libpython3.13                   3.13.7-1ubuntu0.4
  libpython3.14                   3.14.0-1ubuntu0.3
  python3.13                      3.13.7-1ubuntu0.4
  python3.14                      3.14.0-1ubuntu0.3

Ubuntu 24.04 LTS
  libpython3.12t64                3.12.3-1ubuntu0.12
  python3.12                      3.12.3-1ubuntu0.12

Ubuntu 22.04 LTS
  libpython3.10                   3.10.12-1~22.04.15
  libpython3.11                   3.11.0~rc1-1~22.04.1~esm9
                                  Available with Ubuntu Pro
  python3.10                      3.10.12-1~22.04.15
  python3.11                      3.11.0~rc1-1~22.04.1~esm9
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  libpython3.8                    3.8.10-0ubuntu1~20.04.18+esm6
                                  Available with Ubuntu Pro
  libpython3.9                    3.9.5-3ubuntu0~20.04.1+esm10
                                  Available with Ubuntu Pro
  python3.8                       3.8.10-0ubuntu1~20.04.18+esm6
                                  Available with Ubuntu Pro
  python3.9                       3.9.5-3ubuntu0~20.04.1+esm10
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libpython3.6                    3.6.9-1~18.04ubuntu1.13+esm9
                                  Available with Ubuntu Pro
  libpython3.7                    3.7.5-2ubuntu1~18.04.2+esm10
                                  Available with Ubuntu Pro
  libpython3.8                    3.8.0-3ubuntu1~18.04.2+esm10
                                  Available with Ubuntu Pro
  python3.6                       3.6.9-1~18.04ubuntu1.13+esm9
                                  Available with Ubuntu Pro
  python3.7                       3.7.5-2ubuntu1~18.04.2+esm10
                                  Available with Ubuntu Pro
  python3.8                       3.8.0-3ubuntu1~18.04.2+esm10
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libpython3.5                    3.5.2-2ubuntu0~16.04.13+esm22
                                  Available with Ubuntu Pro
  python3.5                       3.5.2-2ubuntu0~16.04.13+esm22
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libpython3.4                    3.4.3-1ubuntu1~14.04.7+esm20
                                  Available with Ubuntu Pro
  libpython3.5                    3.5.2-2ubuntu0~16.04.4~14.04.1+esm10
                                  Available with Ubuntu Pro
  python3.4                       3.4.3-1ubuntu1~14.04.7+esm20
                                  Available with Ubuntu Pro
  python3.5                       3.5.2-2ubuntu0~16.04.4~14.04.1+esm10
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-8018-2

https://ubuntu.com/security/notices/USN-8018-1

CVE-2025-15366, CVE-2025-15367, CVE-2026-0865, https://bugs.launchpad.net/bugs/2143706

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8018-2

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important python regression

Package Information

https://launchpad.net/ubuntu/+source/python3.13/3.13.7-1ubuntu0.4
https://launchpad.net/ubuntu/+source/python3.14/3.14.0-1ubuntu0.3
https://launchpad.net/ubuntu/+source/python3.12/3.12.3-1ubuntu0.12

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