Medium6.5Red Hat Linux

Medium [CVE-2026-11972] Python tarfile module: Denial of Service via improper EOF handling in streaming mode

This medium-severity Red Hat Linux advisory covers CVE-2026-11972.

CVE-2026-11972 Published Jun 23, 2026Updated by vendor Jun 23, 2026

CVE-2026-11972

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Python tarfile module: Denial of Service via improper EOF handling in streaming mode. Red Hat rates this moderate (CVSS 6.5).

Weakness: CWE-835. Red Hat lists fixing advisory RHSA-2026:35813 with package python3-11-main-3.11.15-4.4.hum1, python3-14-main-3.14.6-1.2.hum1, python3-13-main-3.13.14-1.2.hum1, python3-12-main-3.12.13-3.3.hum1.

Affected versions

python3-11-main-3.11.15-4.4.hum1
python3-14-main-3.14.6-1.2.hum1
python3-13-main-3.13.14-1.2.hum1
python3-12-main-3.12.13-3.3.hum1

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

python3-11-main-3.11.15-4.4.hum1
python3-14-main-3.14.6-1.2.hum1
python3-13-main-3.13.14-1.2.hum1
python3-12-main-3.12.13-3.3.hum1
RHSA-2026:35813

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Avoid using tarfile streaming mode (mode='r|') with untrusted tar archives. Use the standard file-based mode (mode='r') instead where possible.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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