title: Red Hat Security Advisory: thunderbird security update
description: Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver Mozilla: Symlinks may resolve to smaller than expected buffers Mozilla: Heap buffer overflow in <code>nsTextFragment</code> Mozilla: Use-after-free in PR_GetIdentitiesLayer Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode Mozilla: Use-after-free in <code>nsDNSService</code> Mozilla: Undefined behavior in <code>ShutdownObserver()</code> Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 Mozilla: S/MIME signature accepted despite mismatching message date Mozilla: Truncated signed text was shown with a valid OpenPGP signature
cpes: cpe:/a:redhat:rhel_eus:8.6::appstream