Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSLs 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.)
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mumble | Mumble | 1.3.0 (including) | 1.3.0 (including) |
| Qt | Qt | 5.12.2 (including) | 5.12.9 (excluding) |
| Qt | Qt | 5.13.0 (including) | 5.13.2 (including) |
| Qt | Qt | 5.14.0 (including) | 5.14.2 (including) |
| Red Hat Enterprise Linux 8 | RedHat | qt5-qtbase-0:5.12.5-6.el8 | * |
| Red Hat Enterprise Linux 8 | RedHat | qt5-qttools-0:5.12.5-2.el8 | * |
| Red Hat Enterprise Linux 8 | RedHat | qt5-qtwebsockets-0:5.12.5-2.el8 | * |
| Qtbase-opensource-src | Ubuntu | eoan | * |
| Qtbase-opensource-src | Ubuntu | esm-apps/focal | * |
| Qtbase-opensource-src | Ubuntu | focal | * |
| Qtbase-opensource-src | Ubuntu | trusty | * |