Ubuntu.comUB:CVE-2021-46977CVE-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 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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | linux | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 14.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
References
git.kernel.org/linus/5104d7ffcf24749939bea7fdb5378d186473f890 (5.13-rc2)
git.kernel.org/stable/c/31f29749ee970c251b3a7e5b914108425940d089
git.kernel.org/stable/c/5104d7ffcf24749939bea7fdb5378d186473f890
git.kernel.org/stable/c/5adcdeb57007ccf8ab7ac20bf787ffb6fafb1a94
git.kernel.org/stable/c/e3ea1895df719c4ef87862501bb10d95f4177bed
launchpad.net/bugs/cve/CVE-2021-46977
nvd.nist.gov/vuln/detail/CVE-2021-46977
security-tracker.debian.org/tracker/CVE-2021-46977
www.cve.org/CVERecord?id=CVE-2021-46977
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