Vulnerability · Published Jul 28, 2025 · Assigned by PSF

CVE-2025-8194Tarfile infinite loop during parsing with negative member offset

High 7.5

In plain English

A high-severity infinite loop in CPython from Python Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.8%top 44.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8platform-python3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:8platform-python-debug3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:8platform-python-devel3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:10python-unversioned-command3.12.9-2.el10_0.3ALSA-2025:14984
AlmaLinux:9python-unversioned-command3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:9python33.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:9python3-debug3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:9python3-devel3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:8python3-idle3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:9python3-idle3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:8python3-libs3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:9python3-libs3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:8python3-test3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:9python3-test3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:8python3-tkinter3.6.8-71.el8_10.alma.1ALSA-2025:14560
AlmaLinux:9python3-tkinter3.9.21-2.el9_6.2ALSA-2025:15019
AlmaLinux:8python3.113.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.113.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.11-debug3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.11-debug3.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.11-devel3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.11-devel3.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.11-idle3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.11-idle3.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.11-libs3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.11-libs3.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.11-rpm-macros3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:8python3.11-test3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.11-test3.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.11-tkinter3.11.13-2.el8_10ALSA-2025:14841
AlmaLinux:9python3.11-tkinter3.11.11-2.el9_6.2ALSA-2025:15010
AlmaLinux:8python3.123.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.123.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python3.12-debug3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.12-debug3.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python3.12-devel3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.12-devel3.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python3.12-idle3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.12-idle3.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python3.12-libs3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.12-libs3.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python3.12-rpm-macros3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:8python3.12-test3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.12-test3.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python3.12-tkinter3.12.11-2.el8_10ALSA-2025:14546
AlmaLinux:9python3.12-tkinter3.12.9-1.el9_6.2ALSA-2025:15007
AlmaLinux:8python393.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-Cython0.29.21-5.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-Cython0.29.21-5.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-PyMySQL0.10.1-2.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-attrs20.3.0-2.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-cffi1.14.3-2.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-cffi1.14.3-2.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-chardet3.0.4-19.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-cryptography3.3.1-3.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-debug3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-devel3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-idle3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-idna2.10-4.module_el8.10.0+3849+a48d89aaALSA-2025:14900
AlmaLinux:8python39-iniconfig1.1.1-2.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-libs3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-lxml4.6.5-1.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-lxml4.6.5-1.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-mod_wsgi4.7.1-7.module_el8.10.0+3989+a618fe15.1ALSA-2025:14900
AlmaLinux:8python39-more-itertools8.5.0-2.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-numpy1.19.4-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-numpy1.19.4-3.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-numpy-doc1.19.4-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-numpy-f2py1.19.4-3.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-numpy-f2py1.19.4-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-packaging20.4-4.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pip20.2.4-9.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-pip-wheel20.2.4-9.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-pluggy0.13.1-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-ply3.11-10.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-psutil5.8.0-4.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-psutil5.8.0-4.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-psycopg22.8.6-3.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-psycopg2-doc2.8.6-3.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-psycopg2-tests2.8.6-3.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-py1.10.0-1.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pybind112.7.1-1.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pybind112.7.1-1.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-pybind11-devel2.7.1-1.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pybind11-devel2.7.1-1.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-pycparser2.20-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pyparsing2.4.7-5.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pysocks1.7.1-4.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pytest6.0.2-2.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-pyyaml5.4.1-1.module_el8.6.0+3248+c431e88cALSA-2025:14900
AlmaLinux:8python39-pyyaml5.4.1-1.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-requests2.25.0-3.module_el8.9.0+3634+fb2a896cALSA-2025:14900
AlmaLinux:8python39-rpm-macros3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-scipy1.5.4-5.module_el8.9.0+3634+fb2a896cALSA-2025:14900
AlmaLinux:8python39-setuptools50.3.2-7.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-setuptools-wheel50.3.2-7.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-six1.15.0-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-test3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-tkinter3.9.20-2.module_el8.10.0+4040+9207bbc0ALSA-2025:14900
AlmaLinux:8python39-toml0.10.1-5.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-urllib31.25.10-5.module_el8.10.0+3765+2f9a457dALSA-2025:14900
AlmaLinux:8python39-wcwidth0.2.5-3.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-wheel1:0.35.1-4.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
AlmaLinux:8python39-wheel-wheel1:0.35.1-4.module_el8.6.0+2780+a40f65e1ALSA-2025:14900
Debian:12pypy3no fix listedDEBIAN-CVE-2025-8194
Debian:13pypy3no fix listedDEBIAN-CVE-2025-8194
Debian:14pypy37.3.21+dfsg-1DEBIAN-CVE-2025-8194
Debian:12python3.113.11.2-6+deb12u7DEBIAN-CVE-2025-8194
Debian:13python3.133.13.5-2+deb13u1DEBIAN-CVE-2025-8194
Rocky Linux:8Cython0:0.29.21-5.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8Cython0:0.29.21-5.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8PyYAML0:5.4.1-1.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8PyYAML0:5.4.1-1.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8PyYAML0:5.4.1-1.module+el8.9.0+1418+f0d66789RLSA-2025:14900
Rocky Linux:8mod_wsgi0:4.7.1-7.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8mod_wsgi0:4.7.1-7.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8mod_wsgi0:4.7.1-7.module+el8.10.0+1978+d4f111ba.1RLSA-2025:14900
Rocky Linux:8numpy0:1.19.4-3.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8numpy0:1.19.4-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8pybind110:2.7.1-1.module+el8.9.0+1357+a3b80af7RLSA-2025:14900
Rocky Linux:8pytest0:6.0.2-2.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8pytest0:6.0.2-2.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1592+61442852RLSA-2025:14900
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1910+234ad790RLSA-2025:14900
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-attrs0:20.3.0-2.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-attrs0:20.3.0-2.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-cffi0:1.14.3-2.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-cffi0:1.14.3-2.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-chardet0:3.0.4-19.module+el8.9.0+1418+f0d66789RLSA-2025:14900
Rocky Linux:8python-chardet0:3.0.4-19.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-chardet0:3.0.4-19.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-cryptography0:3.3.1-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-cryptography0:3.3.1-3.module+el8.10.0+1697+7e517775RLSA-2025:14900
Rocky Linux:8python-idna0:2.10-4.module+el8.10.0+1809+41195054RLSA-2025:14900
Rocky Linux:8python-idna0:2.10-4.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-iniconfig0:1.1.1-2.module+el8.9.0+1332+dd574197RLSA-2025:14900
Rocky Linux:8python-lxml0:4.6.5-1.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-more-itertools0:8.5.0-2.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-more-itertools0:8.5.0-2.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-packaging0:20.4-4.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-packaging0:20.4-4.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-pluggy0:0.13.1-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-pluggy0:0.13.1-3.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-ply0:3.11-10.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-ply0:3.11-10.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-ply0:3.11-10.module+el8.9.0+1418+f0d66789RLSA-2025:14900
Rocky Linux:8python-psutil0:5.8.0-4.module+el8.9.0+1357+a3b80af7RLSA-2025:14900
Rocky Linux:8python-psycopg20:2.8.6-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-psycopg20:2.8.6-3.module+el8.10.0+1660+b5b6f004RLSA-2025:14900
Rocky Linux:8python-py0:1.10.0-1.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-py0:1.10.0-1.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-pycparser0:2.20-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-pycparser0:2.20-3.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-pysocks0:1.7.1-4.module+el8.9.0+1418+f0d66789RLSA-2025:14900
Rocky Linux:8python-pysocks0:1.7.1-4.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-pysocks0:1.7.1-4.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-requests0:2.25.0-3.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-requests0:2.25.0-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-toml0:0.10.1-5.module+el8.9.0+1332+dd574197RLSA-2025:14900
Rocky Linux:8python-urllib30:1.25.10-5.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-urllib30:1.25.10-5.module+el8.10.0+1545+03246da9RLSA-2025:14900
Rocky Linux:8python-wcwidth0:0.2.5-3.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python-wcwidth0:0.2.5-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-wheel1:0.35.1-4.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python-wheel1:0.35.1-4.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python30:3.6.8-71.el8_10.rocky.0RLSA-2025:14560
Rocky Linux:8python3.110:3.11.13-2.el8_10RLSA-2025:14841
Rocky Linux:9python3.110:3.11.11-2.el9_6.2RLSA-2025:15010
Rocky Linux:10python3.120:3.12.9-2.el10_0.3RLSA-2025:14984
Rocky Linux:8python3.120:3.12.11-2.el8_10RLSA-2025:14546
Rocky Linux:9python3.120:3.12.9-1.el9_6.2RLSA-2025:15007
Rocky Linux:9python3.90:3.9.21-2.el9_6.2RLSA-2025:15019
Rocky Linux:8python390:3.9.20-2.module+el8.10.0+2057+30213a2bRLSA-2025:14900
Rocky Linux:8python3x-pip0:20.2.4-9.module+el8.10.0+1721+e52d6351RLSA-2025:14900
Rocky Linux:8python3x-pip0:20.2.4-9.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python3x-pyparsing0:2.4.7-5.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8python3x-pyparsing0:2.4.7-5.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python3x-setuptools0:50.3.2-7.module+el8.10.0+2057+30213a2bRLSA-2025:14900
Rocky Linux:8python3x-six0:1.15.0-3.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Rocky Linux:8python3x-six0:1.15.0-3.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8scipy0:1.5.4-5.module+el8.10.0+1582+bc278001RLSA-2025:14900
Rocky Linux:8scipy0:1.5.4-5.module+el8.10.0+1860+afcc1c71RLSA-2025:14900
Ubuntu:22.04:LTSpython3.103.10.12-1~22.04.11USN-7710-1
Ubuntu:22.04:LTSpython3.103.10.12-1~22.04.11UBUNTU-CVE-2025-8194
Ubuntu:24.04:LTSpython3.123.12.3-1ubuntu0.8UBUNTU-CVE-2025-8194
Ubuntu:24.04:LTSpython3.123.12.3-1ubuntu0.8USN-7710-1
Ubuntu:25.10python3.133.13.6-1UBUNTU-CVE-2025-8194

Affected products (as reported)

VendorProductVersions
Python Software Foundation CPython 0 – before 3.9.243.10.0 – before 3.10.193.11.0 – before 3.11.143.12.0 – before 3.12.123.13.0 – before 3.13.63.14.0a1 – before 3.14.0rc2

Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References