CVE - CVE-2021-47062

CVE-ID
CVE-2021-47062	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/ba7bf5d6336aa9c0d977b161bfa420c56d46ee40 URL:https://git.kernel.org/stable/c/ba7bf5d6336aa9c0d977b161bfa420c56d46ee40 MISC:https://git.kernel.org/stable/c/bd0cced2ae93195668f983d443f7f17e8efd24d2 URL:https://git.kernel.org/stable/c/bd0cced2ae93195668f983d443f7f17e8efd24d2 MISC:https://git.kernel.org/stable/c/c36b16d29f3af5f32fc1b2a3401bf48f71cabee1 URL:https://git.kernel.org/stable/c/c36b16d29f3af5f32fc1b2a3401bf48f71cabee1
Assigning CNA
kernel.org
Date Record Created
20240229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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