CVE-2023-30456: Linux Kernel

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.

Affected products

• Linux Linux Kernel: before 6.2.8 (fixed in 6.2.8); version 6.3 only

Published 2023-04-10. Last modified 2026-06-17.