CVE-2025-8194

HIGH

CPython - Buffer Overflow

Title source: llm

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

References (13)

[Issue Tracking] https://github.com/python/cpython/issues/130577

[Issue Tracking] https://github.com/python/cpython/pull/137027

[Various Sources] https://mail.python.org/archives/list/[email protected]/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/

[Patch] https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38

[Patch] https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe

[Various Sources] https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1

[Patch] https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f

View Patch ZIP pw:eip

[Patch] https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227

[Patch] https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2

[Patch] https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19

[Patch] https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb

[Mailing List] http://www.openwall.com/lists/oss-security/2025/07/28/1

[Mailing List] http://www.openwall.com/lists/oss-security/2025/07/28/2

Scores

CVSS v3 7.5

EPSS 0.0026

EPSS Percentile 49.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-835

Status published

Products (7)

Python Software Foundation/CPython < 3.10.19

Python Software Foundation/CPython < 3.9.24

Python Software Foundation/CPython 3.10.0 - 3.10.19

Python Software Foundation/CPython 3.11.0 - 3.11.14

Python Software Foundation/CPython 3.12.0 - 3.12.12

Python Software Foundation/CPython 3.13.0 - 3.13.6

Python Software Foundation/CPython 3.14.0a1 - 3.14.0rc2

Published Jul 28, 2025

Tracked Since Feb 18, 2026