VULNERABILITY INTELLIGENCE
CVE-2012-3494
CVSS score2.1 LOW
EPSS probability0.44%
CISA KEVNot currently listed
Published2012-11-23
Last modified2026-06-16
CVSS vectorAV:L/AC:L/Au:N/C:N/I:N/A:P
Description
The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.