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firefox: thunderbird: Use-after-free in the JavaScript Engine component

🗓️ 09 Feb 2026 07:38:02Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 5 Views

Use-after-free in the JavaScript Engine affects Firefox and Thunderbird on Unix below 147 and 140.7.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.0aarch64firefox140.7.0-1.el10_0firefox-140.7.0-1.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lefirefox140.7.0-1.el10_0firefox-140.7.0-1.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xfirefox140.7.0-1.el10_0firefox-140.7.0-1.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64firefox140.7.0-1.el10_0firefox-140.7.0-1.el10_0.x86_64.rpm
Red Hat Enterprise Linux10.1aarch64firefox140.7.0-1.el10_1firefox-140.7.0-1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1ppc64lefirefox140.7.0-1.el10_1firefox-140.7.0-1.el10_1.ppc64le.rpm
Red Hat Enterprise Linux10.1s390xfirefox140.7.0-1.el10_1firefox-140.7.0-1.el10_1.s390x.rpm
Red Hat Enterprise Linux10.1x86_64firefox140.7.0-1.el10_1firefox-140.7.0-1.el10_1.x86_64.rpm
Red Hat Enterprise Linux10.0aarch64firefox-debuginfo140.7.0-1.el10_0firefox-debuginfo-140.7.0-1.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lefirefox-debuginfo140.7.0-1.el10_0firefox-debuginfo-140.7.0-1.el10_0.ppc64le.rpm
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15 Jul 2026 03:13Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.19.8
EPSS0.00423
SSVC
5