CVE-2026-90040

CVE-2026-90040 affects the Linux kernel KVM SEV-SNP (AMD Secure Nested Paging) subsystem. When the backing guest_memfd page for the guest-provided VMSA (Virtual Machine State Area) is invalidated (e.g., via PUNCH_HOLE or memslot deletion/move), KVM fails to invalidate the vCPU's cached control.vm...