High [CVE-2026-33416] Arbitrary code execution due to use-after-free vulnerability
This high-severity Red Hat Linux advisory covers CVE-2026-33416 affecting Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 1, Red Hat Enterprise Linux 8.
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Summary
Arbitrary code execution due to use-after-free vulnerability. Red Hat rates this moderate (CVSS 7.5).
Weakness: CWE-825. Affected package(s): libpng, firefox, discovery/discovery-ui-rhel9:1782756541, libpng15, thunderbird, libpng12.
Resolved in Red Hat advisory RHSA-2026:18064 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 7.
- libpng-2:1.6.37-15.el9_8.2
- firefox-0:140.9.1-1.el9_4
- firefox-0:140.9.1-1.el9_6
- firefox-0:140.9.1-1.el9_7
- discovery/discovery-ui-rhel9:1782756541
- firefox-0:140.9.1-1.el10_1
- libpng15-0:1.5.30-15.el9_8.1
- firefox-0:140.9.1-1.el10_0
- firefox-0:140.9.1-1.el9_0
- thunderbird-0:140.9.1-1.el10_1
- thunderbird-0:140.9.1-1.el9_7
- libpng-2:1.6.34-11.el8_10
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:18064
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:18064 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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