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Vulnerabilities CVE-2025-8194

CVE-2025-8194

High
Open
TLP:CLEAR

Tarfile infinite loop during parsing with negative member offset

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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

Details

CVSS Score
7.5
EPSS Score
0.61%

46.1th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Jul 28, 2025
Last Modified
Jul 30, 2026
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