Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish
Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as allowing userspace to manipulate and/or run a vCPU while its state is being synchronized would at best corrupt vCPU state, and at worst crash the host kernel.
Opportunistically assert that vcpu->mutex is held when synchronizing its VMSA (the SEV-ES path already locks vCPUs).
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= ad27ce155566f2b4400fa865859834592bd18777, < 30fd9d8c82087742168db779929d8be0459b0716; >= ad27ce155566f2b4400fa865859834592bd18777, < 4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5; >= ad27ce155566f2b4400fa865859834592bd18777, < c87938fc7d99a06a7e5477c45b4e5a4148f85d66; >= ad27ce155566f2b4400fa865859834592bd18777, < cb923ee6a80f4e604e6242a4702b59251e61a380 |
| Linux | Linux | 6.11 |
References
- https://git.kernel.org/stable/c/30fd9d8c82087742168db779929d8be0459b0716Patch
- https://git.kernel.org/stable/c/4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5Patch
- https://git.kernel.org/stable/c/c87938fc7d99a06a7e5477c45b4e5a4148f85d66Patch
- https://git.kernel.org/stable/c/cb923ee6a80f4e604e6242a4702b59251e61a380Patch
Timeline
- Published
- Apr 24, 2026
- Last modified
- Nov 11, 2026
- NVD status
- Analyzed