CVE-2017-5753 Versions affected: WebKitGTK+ before 2.18.5.Impact: Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker via a side-channel analysis. This variant of the Spectre vulnerability triggers the speculative execution by performing a bounds-check bypass. Description: Security improvements are included to mitigate the effects. CVE-2017-5715 Versions affected: WebKitGTK+ before 2.18.5.Impact: Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker via a side-channel analysis. This variant of the Spectre vulnerability triggers the speculative execution by utilizing branch target injection. Description: Security improvements are included to mitigate the effects.