CVE-2020-13962

Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and
other products, mishandles OpenSSL’s error queue, which can cause a denial
of service to QSslSocket users. Because errors leak in unrelated TLS
sessions, an unrelated session may be disconnected when any handshake
fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)

Bugs

• <https://bugreports.qt.io/browse/QTBUG-83450&gt;
• <https://github.com/mumble-voip/mumble/issues/3679&gt;