CVE-2021-46977
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedFeb 28, 2024
First seenFeb 28, 2024
How to fix
Update
- linux linux_kernel5.10.38, 5.11.22, 5.12.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.5 ≤ v < 5.10.38, 5.11 ≤ v < 5.11.22, 5.12 ≤ v < 5.12.5, 5.13 | 5.10.38, 5.11.22, 5.12.5 |
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