CVE-2025-8291

Publication date 7 October 2025

Last updated 16 January 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.3 · Medium

Score breakdown

Description

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.

Status

Package Ubuntu Release Status
python2.7 26.04 LTS resolute Not in release
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 26.04 LTS resolute Not in release
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+esm17
python3.5 26.04 LTS resolute Not in release
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+esm20
14.04 LTS trusty
Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm8
python3.6 26.04 LTS resolute Not in release
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+esm7
python3.7 26.04 LTS resolute Not in release
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+esm8
python3.8 26.04 LTS resolute Not in release
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+esm3
18.04 LTS bionic
Fixed 3.8.0-3ubuntu1~18.04.2+esm7
python3.9 26.04 LTS resolute Not in release
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+esm7
python3.10 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed 3.10.12-1~22.04.12
python3.11 26.04 LTS resolute Not in release
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~esm6
python3.12 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble
Fixed 3.12.3-1ubuntu0.9
22.04 LTS jammy Not in release
python3.13 26.04 LTS resolute Not in release
25.10 questing
Fixed 3.13.7-1ubuntu0.1
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 26.04 LTS resolute
Not affected
25.10 questing
Needs evaluation
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release

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Patch details

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

Package Patch details
python3.9
python3.10
python3.11
python3.12
python3.13
python3.14

Severity score breakdown

Parameter Value
Base score 4.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-7886-1
    • Python vulnerabilities
    • 24 November 2025
    • USN-7886-2
    • Python vulnerabilities
    • 26 November 2025

Other references

Access our resources on patching vulnerabilities