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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013323 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2021-47062)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
307960	Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013323)	Nessus	Unity Linux Local Security Checks	medium
250137	Linux Distros Unpatched Vulnerability : CVE-2021-47062	Nessus	Misc.	medium
239060	TencentOS Server 4: kernel (TSSA-2024:0958)	Nessus	Tencent Local Security Checks	high

Detections

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CVE-2021-47062

medium

Tenable Plugins

medium

medium

high