CVE-2026-72286
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
In the Linux kernel for KVM SEV, intra-host migration/mirroring of SNP VMs has been disallowed because the feature is not fully implemented. Proper migration requires additional SNP-specific state to be transferred. The fix rejects SNP source VMs in migration/mirroring.
Risk Assessment
Incomplete implementation could lead to incorrect VM behavior or security compromise, so blocking is necessary.
Recommendation
Install the updated Linux kernel with this fix to prevent unsafe SNP migration.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs The intra-host migration/mirroring feature is not fully implemented for SEV-SNP VMs. The proper migration requires additional SNP-specific state such as guest_req_mutex, guest_req_buf, and guest_resp_buf to be transferred or initialized on the destination. The SNP VM mirroring requires vmsa features to be copied as well otherwise ASID would be bound to SNP range while VM is detected as a SEV VM. Reject SNP source VMs in migration/mirroring until proper SNP state transfer is implemented. [sean: let lines poke past 80 chars, tag for stable]