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CVE-2016-3157

UnknownEPSS 0.51%

Last modified

CVE-2016-3157 is a vulnerability of currently unknown severity. The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.

Metrics

EPSS Probability
0.51%

39.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
XenXen4.0.0
CanonicalUbuntu Linux12.04

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-3157?
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
How severe is CVE-2016-3157?
Severity scoring for CVE-2016-3157 is pending analysis. The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.
How do I fix CVE-2016-3157?
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