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cpython: Cpython infinite loop when parsing a tarfile

🗓️ 02 Sep 2025 04:02:44Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

A flaw in the Python tarfile module may cause an infinite loop and denial of service with negative offsets.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64python3.123.12.9-1.el9_6.2python3.12-3.12.9-1.el9_6.2.aarch64.rpm
Red Hat Enterprise Linux9.6i686python3.123.12.9-1.el9_6.2python3.12-3.12.9-1.el9_6.2.i686.rpm
Red Hat Enterprise Linux9.6ppc64lepython3.123.12.9-1.el9_6.2python3.12-3.12.9-1.el9_6.2.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xpython3.123.12.9-1.el9_6.2python3.12-3.12.9-1.el9_6.2.s390x.rpm
Red Hat Enterprise Linux9.6x86_64python3.123.12.9-1.el9_6.2python3.12-3.12.9-1.el9_6.2.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64python3.12-debug3.12.9-1.el9_6.2python3.12-debug-3.12.9-1.el9_6.2.aarch64.rpm
Red Hat Enterprise Linux9.6i686python3.12-debug3.12.9-1.el9_6.2python3.12-debug-3.12.9-1.el9_6.2.i686.rpm
Red Hat Enterprise Linux9.6ppc64lepython3.12-debug3.12.9-1.el9_6.2python3.12-debug-3.12.9-1.el9_6.2.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xpython3.12-debug3.12.9-1.el9_6.2python3.12-debug-3.12.9-1.el9_6.2.s390x.rpm
Red Hat Enterprise Linux9.6x86_64python3.12-debug3.12.9-1.el9_6.2python3.12-debug-3.12.9-1.el9_6.2.x86_64.rpm
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20 Jul 2026 11:00Current
7.3High risk
Vulners AI Score7.3
CVSS 3.17.5
EPSS0.00611
SSVC
CWE-835
tarfile moduleinfinite loopnegative offsetsdenial of servicecrafted archivepython vulnerability
5