Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 资源管理错误漏洞
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel through 5.10.1 与 Xen 4.14.x 一起使用时存在资源管理错误漏洞，该漏洞源于Linux内核PV块后端期望内核线程处理程序在停止时将ring->xenblkd重置为NULL。但是，如果前端在连接和断开状态之间快速切换，处理程序可能没有时间运行。因此，块后端可能会在释放指针后重用指针。行为不端的客户机可以通过持续连接、断开块前端的连接来触发dom0崩溃。不能排除特权升级和信息泄
CVSS Information
N/A
Vulnerability Type
N/A