What’s Vulnerable › Vulnerabilities

CVE-2026-72286: KVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

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]

Affected products

• Linux kernel: 6.11 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6ee4140788234a6fabf59e6a50e38cdb936008cd
• https://git.kernel.org/stable/c/b70404b89daad5f9f33f7ac640b1065cba639935
• https://git.kernel.org/stable/c/ba06690b28be950bd46d938d9b919c4024292627
• https://git.kernel.org/stable/c/d2f9df3b615ca0cd45899c090366945528186052

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