Servers and applications
CVE-2012-3516
The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or administrators to cause a denial of service (host crash) and possibly gain privileges via a crafted grant reference that triggers a write to an arbitrary hypervisor memory location.
- Severity
- Medium 6.9
- Published
- 23 Nov 2012
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Exploit chance
- 0.4% in the next 30 daysHigher than 29% of CVEs. EPSS by FIRST, 12 Nov 2026
- Weakness
- CWE-264
- Attack
- Needs local access · No login needed
- Attacker can
- Read data · Change data · Take it down
- CVSS vector
AV:L/AC:M/Au:N/C:C/I:C/A:C- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
XenServers and applications · cpe:o:xen:xen |
|