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firefox: thunderbird: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154

🗓️ 24 Aug 2026 09:47:03Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

Memory corruption in Firefox and Thunderbird ESR builds, some bugs presumed exploitable.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.10aarch64firefox140.14.0-1.el8_10firefox-140.14.0-1.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10ppc64lefirefox140.14.0-1.el8_10firefox-140.14.0-1.el8_10.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xfirefox140.14.0-1.el8_10firefox-140.14.0-1.el8_10.s390x.rpm
Red Hat Enterprise Linux8.10x86_64firefox140.14.0-1.el8_10firefox-140.14.0-1.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64firefox-debuginfo140.14.0-1.el8_10firefox-debuginfo-140.14.0-1.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10ppc64lefirefox-debuginfo140.14.0-1.el8_10firefox-debuginfo-140.14.0-1.el8_10.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xfirefox-debuginfo140.14.0-1.el8_10firefox-debuginfo-140.14.0-1.el8_10.s390x.rpm
Red Hat Enterprise Linux8.10x86_64firefox-debuginfo140.14.0-1.el8_10firefox-debuginfo-140.14.0-1.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64firefox-debugsource140.14.0-1.el8_10firefox-debugsource-140.14.0-1.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10ppc64lefirefox-debugsource140.14.0-1.el8_10firefox-debugsource-140.14.0-1.el8_10.ppc64le.rpm
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24 Aug 2026 11:08Current
5.6Medium risk
Vulners AI Score5.6
CVSS 3.19.8
EPSS0.00523
SSVC
4