漏洞信息
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Vulnerability Title
grant table v2 race in status page mapping
Vulnerability Description
The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status page(s) via XENMEM_add_to_physmap. Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 竞争条件问题漏洞
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存在竞争条件问题漏洞,该漏洞源于在HVM或PVH客户机并行进行授权表版本从v2更改为v1和通过XENMEM_add_to_physmap映射状态页时存在竞争窗口,可能导致状态页被释放后仍插入到客户机二级页表中。
CVSS Information
N/A
Vulnerability Type
N/A