x86: DoS from attempting to use INVPCID with a non-canonical addresses

ISSUE DESCRIPTION The INVPCID instruction raises GP0 if an attempt is made to invalidate a non-canonical address. Older flushing mechanisms such as INVLPG tolerate this without error, and perform no action. There is one guest accessible path in Xen where a non-canonical address was passed into th...

Opera mitigates critical CPU vulnerabilities

Security Opera mitigates critical CPU vulnerabilities Share January 4th, 2018 There is a lot of uncertainty right now about the impact of the hardware security issue named Meltdown. There will be a scheduled release of Opera which will contain a first set of workarounds as soon as the browser is...