Linux Kernel Vulnerability in KVM Implementation for AMD Processors

CVE-2026-46082

What is CVE-2026-46082?

A vulnerability exists in the Linux kernel's KVM implementation specifically impacting AMD processors. When the Extended Features Enable Register (EFER) settings are not configured correctly (i.e., EFER.SVME=0), the expected behavior of the INVLPGA instruction can be compromised, potentially leading to improper handling of invalid operations. A fix has been implemented to ensure that the appropriate exception (#UD) is injected when this condition is encountered, enhancing the security and stability of virtualized environments. Users are encouraged to update their systems to the latest kernel version to mitigate any risks associated with this vulnerability.

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