In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service (host OS memory consumption) by rebooting many times.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://security.gentoo.org/glsa/201810-06 | vendor advisory |
| http://www.securityfocus.com/bid/102433 | third party advisory vdb entry |
| http://www.securitytracker.com/id/1040774 | vdb entry |
| https://xenbits.xen.org/xsa/advisory-253.html | vendor advisory mitigation issue tracking |