Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.
CVSS Information
N/A
Vulnerability Type
授权机制缺失
Vulnerability Title
KVM 权限许可和访问控制问题漏洞
Vulnerability Description
KVM是基于内核的虚拟机。 KVM 的 AMD 代码中存在权限许可和访问控制问题漏洞，该漏洞源于在处理 L1 来宾提供的 VMCB（虚拟机控制块）以生成/处理嵌套来宾 (L2) 时对“int_ctl”的不正确验证。
CVSS Information
N/A
Vulnerability Type
N/A