CVE-2025-8194

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-8194
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
CVSS

No CVSS.

References
Link Resource
https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f
https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe
https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227
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/
Configurations

No configuration.

History

07 Aug 2025, 21:15

Type Values Removed Values Added
References
  • () https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f -
  • () https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227 -

29 Jul 2025, 14:15

Type Values Removed Values Added
References
  • () https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1 -
Summary 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: import tarfile def _block_patched(self, count):     if count < 0: # pragma: no cover         raise tarfile.InvalidHeaderError("invalid offset")     return _block_patched._orig_block(self, count) _block_patched._orig_block = tarfile.TarInfo._block tarfile.TarInfo._block = _block_patched 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

28 Jul 2025, 20:17

Type Values Removed Values Added
References
  • () https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe -
  • () https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38 -

28 Jul 2025, 19:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-28 19:15

Updated : 2025-08-07 21:15

NVD link : CVE-2025-8194

Mitre link : CVE-2025-8194

JSON object : View

Products Affected

No product.

CWE

No CWE.