Red Hat Security AdvisoryRHSA-2026:19576
python3.9 security update
Released 2026-05-20 · Red Hat rating Important · View on Red Hat →
Fixed in
- Red Hat CodeReady Linux Builder EUS (v.9.6) python3-3.9.21-2.el9_6.6, python3-debug-3.9.21-2.el9_6.6, python3-idle-3.9.21-2.el9_6.6 +2
- Red Hat Enterprise Linux AppStream EUS (v.9.6) python-unversioned-command-3.9.21-2.el9_6.6, python3-devel-3.9.21-2.el9_6.6, python3-tkinter-3.9.21-2.el9_6.6
- Red Hat Enterprise Linux BaseOS EUS (v.9.6) python3-3.9.21-2.el9_6.6, python3-libs-3.9.21-2.el9_6.6, python3.9-3.9.21-2.el9_6.6
Fixes 2 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
