CVE-2016-4480 The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might all...
HighCVSS 8.4
EPSS 0.54%
- Published
- Updated
- Exploit status
- No public exploit known
Description
The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/xen(Debian:12) | < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
| debian/xen(Debian:13) | < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
| debian/xen(Debian:14) | < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
| oracle vm server | = 3.2 | No fix listed |
| oracle vm server | = 3.3 | No fix listed |
| oracle vm server | = 3.4 | No fix listed |
| Xen | <= 4.6.1 | No fix listed |
References
- Debian Security Tracker CVE-2016-4480 vendor-advisory
- DSA-3633 vendor-advisory
- www.oracle.com vendor-advisory
- 90710 vdb-entry
- 1035901 vdb-entry
- xenbits.xen.org vendor-advisory