Riskcovery

CVE-2026-72286

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

State
Published
Severity
8.8 High
Published
Aug 15, 2026
Updated
Oct 16, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

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]

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 1dfe571c12cf99244b933208fb77f29471ded677 to before b70404b89daad5f9f33f7ac640b1065cba639935Affected
  • 1dfe571c12cf99244b933208fb77f29471ded677 to before ba06690b28be950bd46d938d9b919c4024292627Affected
  • 1dfe571c12cf99244b933208fb77f29471ded677 to before d2f9df3b615ca0cd45899c090366945528186052Affected
  • 1dfe571c12cf99244b933208fb77f29471ded677 to before 6ee4140788234a6fabf59e6a50e38cdb936008cdAffected
LinuxLinux
  • 6.11Affected
  • before 6.11Not affected
  • 6.12.97 through 6.12.*Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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