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

🗓️ 05 Feb 2026 10:39:09Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

Use-after-free in the JavaScript GC component affects Firefox and Thunderbird older than 147 and 140.7.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8ppc64lefirefox140.7.0-1.el8_8firefox-140.7.0-1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64firefox140.7.0-1.el8_8firefox-140.7.0-1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lefirefox-debuginfo140.7.0-1.el8_8firefox-debuginfo-140.7.0-1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64firefox-debuginfo140.7.0-1.el8_8firefox-debuginfo-140.7.0-1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lefirefox-debugsource140.7.0-1.el8_8firefox-debugsource-140.7.0-1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64firefox-debugsource140.7.0-1.el8_8firefox-debugsource-140.7.0-1.el8_8.x86_64.rpm

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15 Jul 2026 03:13Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.16.5
EPSS0.00361
SSVC
4