Red Hat Security AdvisoryRHSA-2026:89742
python3.9 security update
Released 2026-10-26 · Red Hat rating Important · View on Red Hat →
Fixed in
- Red Hat Enterprise Linux AppStream (v. 9) python-unversioned-command-3.9.25-7.el9_8.6, python3-devel-3.9.25-7.el9_8.6, python3-tkinter-3.9.25-7.el9_8.6
- Red Hat Enterprise Linux BaseOS (v. 9) python3-3.9.25-7.el9_8.6, python3-libs-3.9.25-7.el9_8.6, python3.9-3.9.25-7.el9_8.6
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3-3.9.25-7.el9_8.6, python3-debug-3.9.25-7.el9_8.6, python3-idle-3.9.25-7.el9_8.6 +2
Fixes 3 records
Priority MEDIUM 40
A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its sni_callback assigns a different context to SSLSocket.context (the documented way to select a certificate per server nam…
CVSS 4.0CRITICAL 9.2· Network · No auth · No interaction · EPSS 0.00524 · Published 2026-09-30 · Partial fix · 3.10.22, 3.11.17 +4 CWE-416
Priority LOW 36
ssl.SSLContext.wrap_bio() didn't require the server_hostname argument to not be None if ssl.SSLContext.check_hostname was set.
CVSS 4.0HIGH 7.6· Network · No auth · User interaction · EPSS 0.00547 · Published 2026-09-30 · Partial fix · 3.10.22, 3.11.17 +4 CWE-297
Priority LOW 26
The cleanup of tempfile.TemporaryDirectory is vulnerable to a race condition.
CVSS 4.0MEDIUM 5.9· Local · No auth · No interaction · EPSS 0.00344 · Published 2026-09-29 · Partial fix · 3.12.15, 3.13.18 +2 CWE-59
