The x86 emulator in Xen 3.2.x through 4.5.x does not properly ignore segment overrides for instructions with register operands, which allows local guest users to obtain sensitive information, cause a denial of service (memory corruption), or possibly execute arbitrary code via unspecified vectors.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Fedora | Fedoraproject | 20 (including) | 20 (including) |
| Fedora | Fedoraproject | 21 (including) | 21 (including) |
| Fedora | Fedoraproject | 22 (including) | 22 (including) |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-409.el5 | * |
| Xen | Ubuntu | devel | * |
| Xen | Ubuntu | precise | * |
| Xen | Ubuntu | trusty | * |
| Xen | Ubuntu | upstream | * |
| Xen | Ubuntu | utopic | * |
| Xen | Ubuntu | vivid | * |
| Xen-3.3 | Ubuntu | lucid | * |
| Xen-3.3 | Ubuntu | upstream | * |