7.5

CVE-2025-8194

Tarfile infinite loop during parsing with negative member offset

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
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerPython Software Foundation
≫
Produkt CPython
Default Statusunaffected
Version 0
Version < 3.10.19
Status affected
Version 3.11.0
Version < 3.11.14
Status affected
Version 3.12.0
Version < 3.12.12
Status affected
Version 3.13.0
Version < 3.13.6
Status affected
Version 3.14.0a1
Version < 3.14.0rc2
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.61% 0.448
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
cna@python.org 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

https://github.com/python/cpython/issues/130577
https://github.com/python/cpython/pull/137027
https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/
https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe
https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f
https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227
https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2
https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19
https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb
http://www.openwall.com/lists/oss-security/2025/07/28/1
http://www.openwall.com/lists/oss-security/2025/07/28/2