Vulnerability Information
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Vulnerability Title
x86: Deadlock in vlapic_error()
Vulnerability Description
In x86's APIC (Advanced Programmable Interrupt Controller) architecture, error conditions are reported in a status register. Furthermore, the OS can opt to receive an interrupt when a new error occurs. It is possible to configure the error interrupt with an illegal vector, which generates an error when an error interrupt is raised. This case causes Xen to recurse through vlapic_error(). The recursion itself is bounded; errors accumulate in the the status register and only generate an interrupt when a new status bit becomes set. However, the lock protecting this state in Xen will try to be taken recursively, and deadlock.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 安全漏洞
Vulnerability Description
Xen是Xen开源的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.5及之前版本存在安全漏洞，该漏洞源于x86的APIC架构中错误中断被配置为非法向量时，当错误中断被触发时会生成错误，有可能会导致死锁。
CVSS Information
N/A
Vulnerability Type
N/A