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).
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 30fd9d8c82087742168db779929d8be0459b0716
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c87938fc7d99a06a7e5477c45b4e5a4148f85d66
6.18.24 (semver)
6.19.14 (semver)
7.0.1 (semver)
References
git.kernel.org/...c/30fd9d8c82087742168db779929d8be0459b0716
git.kernel.org/...c/4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5
git.kernel.org/...c/c87938fc7d99a06a7e5477c45b4e5a4148f85d66