CVE-2021-46977

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

5.5 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-5/8/2026

מוצרים מושפעים

linux: linux kernel

קישורים

• https://git.kernel.org/stable/c/31f29749ee970c251b3a7e5b914108425940d089 Patch
• https://git.kernel.org/stable/c/5104d7ffcf24749939bea7fdb5378d186473f890 Patch
• https://git.kernel.org/stable/c/5adcdeb57007ccf8ab7ac20bf787ffb6fafb1a94 Patch
• https://git.kernel.org/stable/c/e3ea1895df719c4ef87862501bb10d95f4177bed Patch
• https://git.kernel.org/stable/c/31f29749ee970c251b3a7e5b914108425940d089 Patch
• https://git.kernel.org/stable/c/5104d7ffcf24749939bea7fdb5378d186473f890 Patch
• https://git.kernel.org/stable/c/5adcdeb57007ccf8ab7ac20bf787ffb6fafb1a94 Patch
• https://git.kernel.org/stable/c/e3ea1895df719c4ef87862501bb10d95f4177bed Patch