Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs Use the kvm_for_each_vcpu() helper to iterate over vCPUs when encrypting VMSAs for SEV, which effectively switches to use online_vcpus instead of created_vcpus. This fixes a possible null-pointer dereference as created_vcpus does not guarantee a vCPU exists, since it is updated at the very beginning of KVM_CREATE_VCPU. created_vcpus exists to allow the bulk of vCPU creation to run in parallel, while still correctly restricting the max number of max vCPUs.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ad73109ae7ec30d5bfb76be108e304f9f0af4829 before bd0cced2ae93195668f983d443f7f17e8efd24d2; affected ad73109ae7ec30d5bfb76be108e304f9f0af4829 before ba7bf5d6336aa9c0d977b161bfa420c56d46ee40; affected ad73109ae7ec30d5bfb76be108e304f9f0af4829 before c36b16d29f3af5f32fc1b2a3401bf48f71cabee1 |
| Linux / Linux | affected 5.11; unaffected 0 before 5.11; unaffected 5.11.21 through 5.11.*; unaffected 5.12.4 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/bd0cced2ae93195668f983d443f7f17e8efd24d2
- https://git.kernel.org/stable/c/ba7bf5d6336aa9c0d977b161bfa420c56d46ee40
- https://git.kernel.org/stable/c/c36b16d29f3af5f32fc1b2a3401bf48f71cabee1
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.