Improper Handling of Length Parameter Inconsistency The advisory has been revoked - it doesn't affect any version of package python39-devel:3.9/python39-cryptography (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL8-PYTHON39DEVEL-13526596
- published10 Oct 2025
- disclosed7 Oct 2025
Introduced: 7 Oct 2025
CVE-2025-8291 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:8.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python39-devel:3.9/python39-cryptography package and not the python39-devel:3.9/python39-cryptography package as distributed by RHEL.
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.
References
- https://access.redhat.com/security/cve/CVE-2025-8291
- https://github.com/python/cpython/pull/139702
- https://mail.python.org/archives/list/security-announce@python.org/thread/QECOPWMTH4VPPJAXAH2BGTA4XADOP62G/
- https://github.com/python/cpython/commit/162997bb70e067668c039700141770687bc8f267
- https://github.com/python/cpython/commit/333d4a6f4967d3ace91492a39ededbcf3faa76a6
- https://github.com/python/cpython/issues/139700
- https://github.com/python/cpython/commit/1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46
- https://github.com/python/cpython/commit/76437ac248ad8ca44e9bf697b02b1e2241df2196
- https://github.com/python/cpython/commit/8392b2f0d35678407d9ce7d95655a5b77de161b4
- https://github.com/python/cpython/commit/bca11ae7d575d87ed93f5dd6a313be6246e3e388
- https://github.com/python/cpython/commit/d11e69d6203080e3ec450446bfed0516727b85c3
- https://github.com/google/security-research/security/advisories/GHSA-hhv7-p4pg-wm6p
- https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2025-12.json