Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 安全漏洞
Vulnerability Description
Xen是英国剑桥大学开发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 4.6.x及之前版本的arch/x86/mm/guest_walk.c文件中的‘guest_walk_tables’函数存在安全漏洞，该漏洞源于程序没有正确处理L3和L4的Page Size (PS)页表项标志位。本地攻击者可借助特制的内存映射利用该漏洞获取权限。
CVSS Information
N/A
Vulnerability Type
N/A