CVE-2016-9382

Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.

• CWE-264

• http://www.securityfocus.com/bid/94470Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037341Third Party Advisory, VDB Entry
• http://xenbits.xen.org/xsa/advisory-192.htmlPatch, Vendor Advisory
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775Patch, Third Party Advisory
• http://www.securityfocus.com/bid/94470Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037341Third Party Advisory, VDB Entry
• http://xenbits.xen.org/xsa/advisory-192.htmlPatch, Vendor Advisory
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775Patch, Third Party Advisory

Published

Jan 23, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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