Red Hat Security AdvisoryRHSA-2026:19216
python3.9 security update
Released 2026-05-19 · 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, python3-devel-3.9.25-7.el9_8, python3-tkinter-3.9.25-7.el9_8
- Red Hat Enterprise Linux BaseOS (v. 9) python3-3.9.25-7.el9_8, python3-libs-3.9.25-7.el9_8, python3.9-3.9.25-7.el9_8
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3-3.9.25-7.el9_8, python3-debug-3.9.25-7.el9_8, python3-idle-3.9.25-7.el9_8 +2
Fixes 3 records
Priority MEDIUM 42
Use-after-free (UAF) was possible in the `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile` when a memory allocation fails with a `MemoryError` and the decompression instance is re-used.
CVSS 4.0CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00579 · Published 2026-04-13 · Partial fix · 3.10.21, 3.11.16 +4 CWE-416
Priority LOW 33
Mitgation of CVE-2026-4519 was incomplete.
CVSS 4.0HIGH 7.0· Local · No auth · User interaction · EPSS 0.0029 · Published 2026-04-13 · Partial fix · 3.10.21, 3.11.16 +4 CWE-77
Priority LOW 33
The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers.
CVSS 4.0HIGH 7.0· Local · No auth · User interaction · EPSS 0.0032 · Published 2026-03-20 · Fixed in 3.10.21, 3.11.16 +4 CWE-20
