"WebRTC used the memory address of a class instance as a connection identifier. Unfortunately, this value is often transmitted to the peer, which allows bypassing ASLR."
"Crafted media files could lead to a race in texture caches, resulting in a use-after-free, memory corruption, and a potentially exploitable crash."
"Mozilla developers Jason Kratzer and Luke Wagner reported memory safety bugs present in Thunderbird 68.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code."
This issue was resolved and addressed in
GLSA 202007-64 at https://security.gentoo.org/glsa/202007-64
by GLSA coordinator Sam James (sam_c).