Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest (also operating on the timers) to release a lock that it didn't acquire. The most likely effect of the issue is a hang or crash of the hypervisor, i.e., a Denial of Service (DoS). All versions of Xen are affected. Only x86 systems are vulnerable. Arm systems are not vulnerable. Only x86 HVM guests can leverage the vulnerability. x86 PV and PVH cannot leverage the vulnerability. Only guests with more than one vCPU can exploit the vulnerability.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 竞争条件问题漏洞
Vulnerability Description
Xen是英国剑桥大学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 4.14版本及之前版本中存在安全漏洞。该漏洞源于定时器触发一个致命错误。攻击者可利用该漏洞拒绝服务的主机系统。
CVSS Information
N/A
Vulnerability Type
N/A