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thunderbird: Out of bounds read in IMAP parsing

🗓️ 15 Apr 2026 14:07:46Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

Thunderbird flaw: negative-length strings from servers cause out-of-bounds reads and possible data leaks.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.0aarch64thunderbird140.9.0-1.el10_0thunderbird-140.9.0-1.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lethunderbird140.9.0-1.el10_0thunderbird-140.9.0-1.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xthunderbird140.9.0-1.el10_0thunderbird-140.9.0-1.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64thunderbird140.9.0-1.el10_0thunderbird-140.9.0-1.el10_0.x86_64.rpm
Red Hat Enterprise Linux10.0aarch64thunderbird-debuginfo140.9.0-1.el10_0thunderbird-debuginfo-140.9.0-1.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lethunderbird-debuginfo140.9.0-1.el10_0thunderbird-debuginfo-140.9.0-1.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xthunderbird-debuginfo140.9.0-1.el10_0thunderbird-debuginfo-140.9.0-1.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64thunderbird-debuginfo140.9.0-1.el10_0thunderbird-debuginfo-140.9.0-1.el10_0.x86_64.rpm
Red Hat Enterprise Linux10.0aarch64thunderbird-debugsource140.9.0-1.el10_0thunderbird-debugsource-140.9.0-1.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lethunderbird-debugsource140.9.0-1.el10_0thunderbird-debugsource-140.9.0-1.el10_0.ppc64le.rpm
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15 Jul 2026 02:07Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.18.2
EPSS0.0036
SSVC
4