CVE-2021-47062

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.
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

10 Dec 2024, 16:43

Type Values Removed Values Added
CWE CWE-476
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/ba7bf5d6336aa9c0d977b161bfa420c56d46ee40 - () https://git.kernel.org/stable/c/ba7bf5d6336aa9c0d977b161bfa420c56d46ee40 - Patch
References () https://git.kernel.org/stable/c/bd0cced2ae93195668f983d443f7f17e8efd24d2 - () https://git.kernel.org/stable/c/bd0cced2ae93195668f983d443f7f17e8efd24d2 - Patch
References () https://git.kernel.org/stable/c/c36b16d29f3af5f32fc1b2a3401bf48f71cabee1 - () https://git.kernel.org/stable/c/c36b16d29f3af5f32fc1b2a3401bf48f71cabee1 - Patch

Information

Published : 2024-02-29 23:15

Updated : 2024-12-10 16:43


NVD link : CVE-2021-47062

Mitre link : CVE-2021-47062

CVE.ORG link : CVE-2021-47062


JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference