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CVE-2016-4480

UnknownEPSS 0.55%

Last modified

CVE-2016-4480 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.55%

41.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
OracleVm Server3.2
OracleVm Server3.3
OracleVm Server3.4
XenXen<= 4.6.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 allow local guest OS users to gain privileges via a crafted mapping of memory.
How severe is CVE-2016-4480?
Severity scoring for CVE-2016-4480 is pending analysis. The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.
How do I fix CVE-2016-4480?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST