cbcvebase.
CVE-2021-46977
published 2024-02-28

CVE-2021-46977: In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.3th percentile
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.

Affected

14 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.10.38-1 (bookworm)linux 5.10.38-1 (bookworm)
linuxlinux——
linuxlinux>= 4be5341026246870818e28b53202b001426a5aec < 31f29749ee970c251b3a7e5b914108425940d08931f29749ee970c251b3a7e5b914108425940d089
linuxlinux>= 4be5341026246870818e28b53202b001426a5aec < 5adcdeb57007ccf8ab7ac20bf787ffb6fafb1a945adcdeb57007ccf8ab7ac20bf787ffb6fafb1a94
linuxlinux>= 4be5341026246870818e28b53202b001426a5aec < e3ea1895df719c4ef87862501bb10d95f4177bede3ea1895df719c4ef87862501bb10d95f4177bed
linuxlinux>= 4be5341026246870818e28b53202b001426a5aec < 5104d7ffcf24749939bea7fdb5378d186473f8905104d7ffcf24749939bea7fdb5378d186473f890
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 5.11 < 5.11.225.11.22
linuxlinux_kernel>= 5.12 < 5.12.55.12.5
linuxlinux_kernel>= 5.5 < 5.10.385.10.38

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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