🛡️ CVE-2025-8194 on Debian — pypy3

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

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

Distribution advisory

This page covers CVE-2025-8194 as tracked by Debian, for the package pypy3. The fix is available in version 7.3.21+dfsg-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

DEBIAN-CVE-2025-8194 is recorded against 5 packages.

pypy3 (fixed in 7.3.21+dfsg-1)
python2.7
python3.11 (fixed in 3.11.2-6+deb12u7)
python3.13 (fixed in 3.13.6-1)
python3.9 (fixed in 3.9.2-1+deb11u4)

Timeline and source

Published on 28 July 2025 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2025-8194 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

BellSoft Base record Debian 11 (Root.io)Debian 12 (Root.io)Debian 13 (Root.io)Ubuntu 22.04 (Root.io)Ubuntu

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2025-07-28

Updated 2026-08-12

Modified 2026-08-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
pypy3	—	7.3.21+dfsg-1
python2.7	—	—
python3.11	—	3.11.2-6+deb12u7
python3.13	—	3.13.6-1
python3.9	—	3.9.2-1+deb11u4

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2025-8194

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