Total vulnerabilities in the database
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.
| Software | From | Fixed in |
|---|---|---|
| xen / xen | 4.1.0 | 4.1.0.x |
| xen / xen | 4.0.0 | 4.0.0.x |
| xen / xen | 4.2.0 | 4.2.0.x |
| citrix / xenserver | - | 6.0.2.x |