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Database

Insecure functionality In python3.13

Description

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Component
Affected version
Patched versions

1-10 of 22

10

Aliases

1. CVE-2025-81942. NVD-2025-81943. OSV-DEBIAN-2025-81944. OSV-2025-81945. GCVE-2025-81946. SECURITY-TRACKER-CVE-2025-81947. https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8194.json8. mail.python.org

References

1. http://www.openwall.com/lists/oss-security/2025/07/28/12. http://www.openwall.com/lists/oss-security/2025/07/28/23. https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e14. https://github.com/python/cpython/issues/1305775. https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc26. https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa387. https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef198. https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb9. https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f10. https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe11. https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b451027722712. https://github.com/python/cpython/pull/137027

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