CVE-2021-46977 — KVM: VMX: Disable preemption when probing user return MSRs
In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing a user return MS…
Published: 2024-02-28 · CVSS: 7.8 · CVSS 3.1
In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing a user return MSR via RDSMR/WRMSR. If the MSR holds a different value per logical CPU, the WRMSR could corrupt the host's value if KVM is preempted between the RDMSR and WRMSR, and then rescheduled on a different CPU. Opportunistically land the helper in common x86, SVM will use the helper in a future commit.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7