RHSA-2026:74087 - Security Advisory

Topic

An update for python3.9 is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• cpython: Python HTMLParser quadratic complexity (CVE-2025-6069)
• python: Quadratic complexity in os.path.expandvars() with user-controlled template (CVE-2025-6075)
• python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory (CVE-2026-11940)
• python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations (CVE-2026-15308)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server - AUS 9.4 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.4 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.4 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.4 s390x

Fixes

• BZ - 2373234 - CVE-2025-6069 cpython: Python HTMLParser quadratic complexity
• BZ - 2408891 - CVE-2025-6075 python: Quadratic complexity in os.path.expandvars() with user-controlled template
• BZ - 2491848 - CVE-2026-11940 python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory
• BZ - 2498608 - CVE-2026-15308 python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations

CVEs

• CVE-2025-6069
• CVE-2025-6075
• CVE-2026-11940
• CVE-2026-15308

References

• https://access.redhat.com/security/updates/classification/#important