The x86 segment base write emulation functionality in Xen 4.4.x through 4.7.x allows local x86 PV guest OS administrators to cause a denial of service (host crash) by leveraging lack of canonical address checks.
https://support.citrix.com/article/CTX218775
http://www.securitytracker.com/id/1037342
http://www.securityfocus.com/bid/94472
https://security.gentoo.org/glsa/201612-56
http://xenbits.xen.org/xsa/advisory-193.html
Source: Mitre, NVD
Published: 2017-01-23
Updated: 2025-04-20
Base Score: 4.9
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C
Severity: Medium
Base Score: 6
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
EPSS: 0.00104