RHSA-2026:13977: CVEs fixed (Red Hat)

RHSA-2026:13977 fixes 1 tracked CVE. Affected systems and fixed versions.

• CVE-2026-5734 CRITICAL 9.8 UPGRADE UPGRADE Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 14

Applies to

• RHEL 7 Extended Lifecycle Support · fixed in firefox-140.9.1-2.el7_9

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