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KVM: SVM: Unpredictable System Behavior with AMD CPUs

published 5 months ago
Summary

The Linux kernel's KVM (Kernel-based Virtual Machine) component for AMD CPUs has a fix to prevent a potential issue. If a specific condition occurs, it could lead to unexpected system behavior. This issue has been addressed in the latest Linux kernel updates, so it's essential to keep your kernel up to date.

What to do
  • Update linux kernel to version 7.0.4.
Affected software
Ecosystem VendorProductAffected versions
Linux linux kernel >= 6.19.0, < 7.0.4
Fix: upgrade to 7.0.4
Original advisory text
KVM: SVM: Inject #UD for INVLPGA if EFER.SVME=0
In the Linux kernel, the following vulnerability has been resolved:

KVM: SVM: Inject #UD for INVLPGA if EFER.SVME=0

INVLPGA should cause a #UD when EFER.SVME is not set. Add a check to
properly inject #UD when EFER.SVME=0.

[sean: tag for stable@]
References
Timeline
Published27 May 2026
Updated28 Jul 2026
First seen28 Jul 2026
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