CVE-2025-8194

28.07.2025, 19:15

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

Infinite Loop

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
PSF	CNA	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADP	ADP	---				---

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: 27%

Ubuntu Releases

Ubuntu Product

Codename

python2.7

plucky	dne
noble	dne
jammy	Fixed 2.7.18-13ubuntu1.5+esm7 released
focal	Fixed 2.7.18-1~20.04.7+esm8 released
bionic	Fixed 2.7.17-1~18.04ubuntu1.13+esm12 released
xenial	Fixed 2.7.12-1ubuntu0~16.04.18+esm17 released
trusty	Fixed 2.7.6-8ubuntu0.6+esm26 released

python3.4

plucky	dne
noble	dne
jammy	dne
trusty	Fixed 3.4.3-1ubuntu1~14.04.7+esm16 released

python3.5

plucky	dne
noble	dne
jammy	dne
xenial	Fixed 3.5.2-2ubuntu0~16.04.13+esm19 released
trusty	Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm7 released

python3.6

plucky	dne
noble	dne
jammy	dne
bionic	Fixed 3.6.9-1~18.04ubuntu1.13+esm6 released

python3.7

plucky	dne
noble	dne
jammy	dne
bionic	Fixed 3.7.5-2ubuntu1~18.04.2+esm7 released

python3.8

plucky	dne
noble	dne
jammy	dne
focal	Fixed 3.8.10-0ubuntu1~20.04.18+esm2 released
bionic	Fixed 3.8.0-3ubuntu1~18.04.2+esm6 released

python3.9

plucky	dne
noble	dne
jammy	dne
focal	Fixed 3.9.5-3ubuntu0~20.04.1+esm6 released

python3.10

plucky	dne
noble	dne
jammy	Fixed 3.10.12-1~22.04.11 released

python3.11

plucky	dne
noble	dne
jammy	Fixed 3.11.0~rc1-1~22.04.1~esm5 released

python3.12

plucky	dne
noble	Fixed 3.12.3-1ubuntu0.8 released
jammy	dne

python3.13

plucky	Fixed 3.13.3-1ubuntu0.3 released
noble	dne
jammy	dne

python3.14

plucky	dne
noble	dne
jammy	dne

Common Weakness Enumeration

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
The program contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Vulnerability Media Exposure

References

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/