An issue was discovered in Xen through 4.9.x allowing x86 PV guest OS users to execute arbitrary code on the host OS because of a race condition that can cause a stale TLB entry.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Link | Tags |
---|---|
http://www.securityfocus.com/bid/101490 | vdb entry third party advisory |
https://lists.debian.org/debian-lts-announce/2017/11/msg00027.html | mailing list |
https://www.debian.org/security/2017/dsa-4050 | vendor advisory |
https://support.citrix.com/article/CTX228867 | |
https://xenbits.xen.org/xsa/advisory-241.html | mailing list patch mitigation vendor advisory |
https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html | mailing list |
https://security.gentoo.org/glsa/201801-14 | vendor advisory |
http://www.securitytracker.com/id/1039568 | vdb entry third party advisory |