Vulnerability · Published Oct 31, 2025 · Assigned by PSF

CVE-2025-6075Quadratic complexity in os.path.expandvars() with user-controlled template

Low 1.8

In plain English

A low-severity uncontrolled resource consumption 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 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)1.8Low
Exploit odds (30 days)0.1%top 95.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

If the value passed to os.path.expandvars() is user-controlled a performance degradation is possible when expanding environment variables.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10python-unversioned-command3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python-unversioned-command3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python33.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python33.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python3-debug3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python3-debug3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python3-devel3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python3-devel3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python3-idle3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python3-idle3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python3-libs3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python3-libs3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python3-test3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python3-test3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:10python3-tkinter3.12.13-2.el10_2ALSA-2026:19064
AlmaLinux:9python3-tkinter3.9.25-2.el9_7ALSA-2025:23342
AlmaLinux:8python3.123.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.123.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python3.12-debug3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.12-debug3.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python3.12-devel3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.12-devel3.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python3.12-idle3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.12-idle3.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python3.12-libs3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.12-libs3.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python3.12-rpm-macros3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:8python3.12-test3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.12-test3.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python3.12-tkinter3.12.13-2.el8_10ALSA-2026:10950
AlmaLinux:9python3.12-tkinter3.12.13-2.el9_8ALSA-2026:19177
AlmaLinux:8python393.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-Cython0.29.21-5.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-Cython0.29.21-5.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-PyMySQL0.10.1-2.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-attrs20.3.0-2.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-cffi1.14.3-2.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-cffi1.14.3-2.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-chardet3.0.4-19.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-cryptography3.3.1-3.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-debug3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-devel3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-idle3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-idna2.10-4.module_el8.10.0+3849+a48d89aaALSA-2025:23530
AlmaLinux:8python39-iniconfig1.1.1-2.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-libs3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-lxml4.6.5-1.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-lxml4.6.5-1.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-mod_wsgi4.7.1-7.module_el8.10.0+3989+a618fe15.1ALSA-2025:23530
AlmaLinux:8python39-more-itertools8.5.0-2.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-numpy1.19.4-3.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-numpy1.19.4-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-numpy-doc1.19.4-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-numpy-f2py1.19.4-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-numpy-f2py1.19.4-3.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-packaging20.4-4.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pip20.2.4-9.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-pip-wheel20.2.4-9.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-pluggy0.13.1-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-ply3.11-10.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-psutil5.8.0-4.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-psutil5.8.0-4.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-psycopg22.8.6-3.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-psycopg2-doc2.8.6-3.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-psycopg2-tests2.8.6-3.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-py1.10.0-1.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pybind112.7.1-1.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-pybind112.7.1-1.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pybind11-devel2.7.1-1.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pybind11-devel2.7.1-1.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-pycparser2.20-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pyparsing2.4.7-5.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pysocks1.7.1-4.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pytest6.0.2-2.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-pyyaml5.4.1-1.module_el8.6.0+3248+c431e88cALSA-2025:23530
AlmaLinux:8python39-pyyaml5.4.1-1.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-requests2.25.0-3.module_el8.9.0+3634+fb2a896cALSA-2025:23530
AlmaLinux:8python39-rpm-macros3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-scipy1.5.4-5.module_el8.9.0+3634+fb2a896cALSA-2025:23530
AlmaLinux:8python39-setuptools50.3.2-7.module_el8.10.0+4040+9207bbc0ALSA-2025:23530
AlmaLinux:8python39-setuptools-wheel50.3.2-7.module_el8.10.0+4040+9207bbc0ALSA-2025:23530
AlmaLinux:8python39-six1.15.0-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-test3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-tkinter3.9.25-2.module_el8.10.0+4083+53cad1fbALSA-2025:23530
AlmaLinux:8python39-toml0.10.1-5.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-urllib31.25.10-5.module_el8.10.0+3765+2f9a457dALSA-2025:23530
AlmaLinux:8python39-wcwidth0.2.5-3.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-wheel1:0.35.1-4.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
AlmaLinux:8python39-wheel-wheel1:0.35.1-4.module_el8.6.0+2780+a40f65e1ALSA-2025:23530
Debian:12pypy3no fix listedDEBIAN-CVE-2025-6075
Debian:13pypy3no fix listedDEBIAN-CVE-2025-6075
Debian:14pypy37.3.21+dfsg-1DEBIAN-CVE-2025-6075
Debian:12python3.113.11.2-6+deb12u7DEBIAN-CVE-2025-6075
Debian:13python3.133.13.5-2+deb13u1DEBIAN-CVE-2025-6075
Debian:14python3.143.14.2-1DEBIAN-CVE-2025-6075
Rocky Linux:8Cython0:0.29.21-5.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8Cython0:0.29.21-5.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8PyYAML0:5.4.1-1.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8PyYAML0:5.4.1-1.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8PyYAML0:5.4.1-1.module+el8.9.0+1418+f0d66789RLSA-2025:23530
Rocky Linux:8mod_wsgi0:4.7.1-7.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8mod_wsgi0:4.7.1-7.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8mod_wsgi0:4.7.1-7.module+el8.10.0+1978+d4f111ba.1RLSA-2025:23530
Rocky Linux:8numpy0:1.19.4-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8numpy0:1.19.4-3.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8pybind110:2.7.1-1.module+el8.9.0+1357+a3b80af7RLSA-2025:23530
Rocky Linux:8pytest0:6.0.2-2.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8pytest0:6.0.2-2.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1592+61442852RLSA-2025:23530
Rocky Linux:8python-PyMySQL0:0.10.1-2.module+el8.10.0+1910+234ad790RLSA-2025:23530
Rocky Linux:8python-attrs0:20.3.0-2.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-attrs0:20.3.0-2.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-cffi0:1.14.3-2.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-cffi0:1.14.3-2.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-chardet0:3.0.4-19.module+el8.9.0+1418+f0d66789RLSA-2025:23530
Rocky Linux:8python-chardet0:3.0.4-19.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-chardet0:3.0.4-19.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-cryptography0:3.3.1-3.module+el8.10.0+1697+7e517775RLSA-2025:23530
Rocky Linux:8python-cryptography0:3.3.1-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-idna0:2.10-4.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-idna0:2.10-4.module+el8.10.0+1809+41195054RLSA-2025:23530
Rocky Linux:8python-iniconfig0:1.1.1-2.module+el8.9.0+1332+dd574197RLSA-2025:23530
Rocky Linux:8python-lxml0:4.6.5-1.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-more-itertools0:8.5.0-2.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-more-itertools0:8.5.0-2.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-packaging0:20.4-4.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-packaging0:20.4-4.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-pluggy0:0.13.1-3.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-pluggy0:0.13.1-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-ply0:3.11-10.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-ply0:3.11-10.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-ply0:3.11-10.module+el8.9.0+1418+f0d66789RLSA-2025:23530
Rocky Linux:8python-psutil0:5.8.0-4.module+el8.9.0+1357+a3b80af7RLSA-2025:23530
Rocky Linux:8python-psycopg20:2.8.6-3.module+el8.10.0+1660+b5b6f004RLSA-2025:23530
Rocky Linux:8python-psycopg20:2.8.6-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-py0:1.10.0-1.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-py0:1.10.0-1.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-pycparser0:2.20-3.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-pycparser0:2.20-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-pysocks0:1.7.1-4.module+el8.9.0+1418+f0d66789RLSA-2025:23530
Rocky Linux:8python-pysocks0:1.7.1-4.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-pysocks0:1.7.1-4.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-requests0:2.25.0-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-requests0:2.25.0-3.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-toml0:0.10.1-5.module+el8.9.0+1332+dd574197RLSA-2025:23530
Rocky Linux:8python-urllib30:1.25.10-5.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-urllib30:1.25.10-5.module+el8.10.0+1545+03246da9RLSA-2025:23530
Rocky Linux:8python-wcwidth0:0.2.5-3.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-wcwidth0:0.2.5-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python-wheel1:0.35.1-4.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python-wheel1:0.35.1-4.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:10python3.120:3.12.13-2.el10_2RLSA-2026:19064
Rocky Linux:8python3.120:3.12.13-2.el8_10RLSA-2026:10950
Rocky Linux:9python3.120:3.12.13-2.el9_8RLSA-2026:19177
Rocky Linux:9python3.90:3.9.25-2.el9_7RLSA-2025:23342
Rocky Linux:8python3x-pip0:20.2.4-9.module+el8.10.0+1721+e52d6351RLSA-2025:23530
Rocky Linux:8python3x-pip0:20.2.4-9.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python3x-pyparsing0:2.4.7-5.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8python3x-pyparsing0:2.4.7-5.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python3x-setuptools0:50.3.2-7.module+el8.10.0+2057+30213a2bRLSA-2025:23530
Rocky Linux:8python3x-six0:1.15.0-3.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Rocky Linux:8python3x-six0:1.15.0-3.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8scipy0:1.5.4-5.module+el8.10.0+1582+bc278001RLSA-2025:23530
Rocky Linux:8scipy0:1.5.4-5.module+el8.10.0+1860+afcc1c71RLSA-2025:23530
Ubuntu:22.04:LTSpypy3no fix listedUBUNTU-CVE-2025-6075
Ubuntu:24.04:LTSpypy3no fix listedUBUNTU-CVE-2025-6075
Ubuntu:25.10pypy3no fix listedUBUNTU-CVE-2025-6075
Ubuntu:26.04:LTSpypy3no fix listedUBUNTU-CVE-2025-6075
Ubuntu:26.10pypy3no fix listedUBUNTU-CVE-2025-6075
Ubuntu:22.04:LTSpython3.103.10.12-1~22.04.12UBUNTU-CVE-2025-6075
Ubuntu:22.04:LTSpython3.103.10.12-1~22.04.12USN-7886-1
Ubuntu:24.04:LTSpython3.123.12.3-1ubuntu0.9USN-7886-1
Ubuntu:24.04:LTSpython3.123.12.3-1ubuntu0.9UBUNTU-CVE-2025-6075
Ubuntu:25.10python3.133.13.7-1ubuntu0.1UBUNTU-CVE-2025-6075
Ubuntu:25.10python3.133.13.7-1ubuntu0.1USN-7886-2
Ubuntu:25.10python3.14no fix listedUBUNTU-CVE-2025-6075

Affected products (as reported)

VendorProductVersions
Python Software Foundation CPython 0 – before 3.9.253.10.0 – before 3.10.203.11.0 – before 3.11.153.12.0 – before 3.12.133.13.0 – before 3.13.103.14.0 – before 3.14.13.15.0a1 – before 3.15.0a2

Weakness: CWE-400 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

References