CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.
2017-01-26T15:59:00.407
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 3.3 (LOW)
AV:L/AC:L/Au:N/C:P/I:N/A:N
3.9
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | xen | xen | 3.3.0 | Yes |
| Operating System | xen | xen | 3.3.1 | Yes |
| Operating System | xen | xen | 3.3.2 | Yes |
| Operating System | xen | xen | 3.4.0 | Yes |
| Operating System | xen | xen | 3.4.1 | Yes |
| Operating System | xen | xen | 3.4.2 | Yes |
| Operating System | xen | xen | 3.4.3 | Yes |
| Operating System | xen | xen | 3.4.4 | Yes |
| Operating System | xen | xen | 4.0.0 | Yes |
| Operating System | xen | xen | 4.0.1 | Yes |
| Operating System | xen | xen | 4.0.2 | Yes |
| Operating System | xen | xen | 4.0.3 | Yes |
| Operating System | xen | xen | 4.0.4 | Yes |
| Operating System | xen | xen | 4.1.0 | Yes |
| Operating System | xen | xen | 4.1.1 | Yes |
| Operating System | xen | xen | 4.1.2 | Yes |
| Operating System | xen | xen | 4.1.3 | Yes |
| Operating System | xen | xen | 4.1.4 | Yes |
| Operating System | xen | xen | 4.1.5 | Yes |
| Operating System | xen | xen | 4.1.6 | Yes |
| Operating System | xen | xen | 4.1.6.1 | Yes |
| Operating System | xen | xen | 4.2.0 | Yes |
| Operating System | xen | xen | 4.2.1 | Yes |
| Operating System | xen | xen | 4.2.2 | Yes |
| Operating System | xen | xen | 4.2.3 | Yes |
| Operating System | xen | xen | 4.2.4 | Yes |
| Operating System | xen | xen | 4.2.5 | Yes |
| Operating System | xen | xen | 4.3.0 | Yes |
| Operating System | xen | xen | 4.3.1 | Yes |
| Operating System | xen | xen | 4.3.2 | Yes |
| Operating System | xen | xen | 4.3.3 | Yes |
| Operating System | xen | xen | 4.3.4 | Yes |
| Operating System | xen | xen | 4.4.0 | Yes |
| Operating System | xen | xen | 4.4.1 | Yes |
| Operating System | xen | xen | 4.4.2 | Yes |
| Operating System | xen | xen | 4.4.3 | Yes |
| Operating System | xen | xen | 4.4.4 | Yes |
| Operating System | xen | xen | 4.5.0 | Yes |
| Operating System | xen | xen | 4.5.1 | Yes |
| Operating System | xen | xen | 4.5.2 | Yes |
| Operating System | xen | xen | 4.5.3 | Yes |
| Operating System | xen | xen | 4.5.5 | Yes |
| Operating System | xen | xen | 4.6.0 | Yes |
| Operating System | xen | xen | 4.6.3 | Yes |
| Operating System | xen | xen | 4.7.0 | Yes |