CVE-2025-12084

Publication date 3 December 2025

Last updated 5 February 2026

Ubuntu priority

Medium

Why this priority?

Description

When building nested elements using xml.dom.minidom methods such as appendChild() that have a dependency on _clear_id_cache() the algorithm is quadratic. Availability can be impacted when building excessively nested documents.

Read the notes from the security team

Status

Package Ubuntu Release Status
jython 25.10 questing
Needs evaluation
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
pypy3 25.10 questing
Needs evaluation
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
python2.7 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation
python3.4 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
14.04 LTS trusty
Fixed 3.4.3-1ubuntu1~14.04.7+esm19
python3.5 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Fixed 3.5.2-2ubuntu0~16.04.13+esm21
14.04 LTS trusty
Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
python3.6 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Fixed 3.6.9-1~18.04ubuntu1.13+esm8
python3.7 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Fixed 3.7.5-2ubuntu1~18.04.2+esm9
python3.8 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed 3.8.10-0ubuntu1~20.04.18+esm5
18.04 LTS bionic
Fixed 3.8.0-3ubuntu1~18.04.2+esm9
python3.9 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed 3.9.5-3ubuntu0~20.04.1+esm9
python3.10 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed 3.10.12-1~22.04.14
python3.11 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed 3.11.0~rc1-1~22.04.1~esm8
python3.12 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble
Fixed 3.12.3-1ubuntu0.11
22.04 LTS jammy Not in release
python3.13 25.10 questing
Fixed 3.13.7-1ubuntu0.3
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
python3.14 25.10 questing
Fixed 3.14.0-1ubuntu0.2
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release

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Notes

mdeslaur

The original commits that fix this issue resulted in a regression and a couple of subsequent fixes.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
python3.10
python3.11
python3.12
python3.13
python3.14

References

Related Ubuntu Security Notices (USN)

    • USN-8018-1
    • Python vulnerabilities
    • 5 February 2026

Other references