Description
In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified Force a refresh of the vmcs02 MSR bitmap during nested VM-Enter if the runtime eVMCS controls (pin, primary, secondary, etc.) are being updated. If L1 isn't intercepting TPR writes, runs L2 with TPR virtualization, and then runs the same L2 with TPR virtualization disabled, KVM will fail to refresh msr_bitmap02 and leave TPR in passthrough mode even though TPR virtualization is disabled. I.e. failure to refresh the bitmap lets L2 (or L1 by proxy) read and write L0's TPR.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e to < 2db11598b59f16ddb6420693f9a4ac4efc3d4789affected502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e to < f6189e26d0237e47e2f04f9cb1e43fd19a9b2f3aaffected502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e to < 1e497e3bdab6983deb68a1d26b488027deb4527faffected502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e to < 2abb25273c82061dd4670690c81c319c03740bf6affected
Linux Linux
Default version status: affected
5.17affected0 to < 5.17unaffected6.12.113 to ≤ 6.12.*unaffected6.18.56 to ≤ 6.18.*unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected