Mozilla is vulnerable to denial of service (DoS). The attack exists via the out-of-bounds read when processing certain email messages.
access.redhat.com/errata/RHSA-2020:0565
access.redhat.com/security/updates/classification/#important
bugzilla.mozilla.org/show_bug.cgi?id=1608539
security.gentoo.org/glsa/202003-10
usn.ubuntu.com/4328-1/
usn.ubuntu.com/4335-1/
www.mozilla.org/en-US/security/advisories/mfsa2020-07/
www.mozilla.org/security/advisories/mfsa2020-07/