kernel: kvm: noncanonical MSR writes

It was found that KVM's Write to Model Specific Register WRMSR instruction emulation would write non-canonical values passed in by the guest to certain MSRs in the host's context. A privileged guest user could use this flaw to crash the host...

PT-2013-6331 · Linux +5 · Linux Kernel +5

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 3.15.4 Description: The issue is related to the Linux kernel's handling of non-canonical values for the saved RIP address in system calls that do not use IRET. This can allow local users to leverage a race...