CVE Alert: CVE-2025-8194

Vulnerability Summary: 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: 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

Affected Endpoints:

No affected endpoints listed.

Published Date:

7/28/2025, 7:15:43 PM

🔥 CVSS Score:

Exploit Status:

Not Exploited

References:

• https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
• https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe
• https://github.com/python/cpython/issues/130577
• https://github.com/python/cpython/pull/137027
• https://mail.python.org/archives/list/[email protected]/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/

Recommended Action:

No proposed action available. Please refer to vendor documentation for updates.

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