Strix
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CVE-2012-3495

UnknownEPSS 0.44%

Last modified

CVE-2012-3495 is a vulnerability of currently unknown severity. The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.

Metrics

EPSS Probability
0.44%

35.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CitrixXenserver<= 6.0.2
CitrixXenserver5.0
CitrixXenserver5.5
CitrixXenserver5.6
CitrixXenserver6.0
XenXen4.1.0
XenXen4.1.1
XenXen4.1.2
XenXen4.1.3

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2012-3495?
The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
How severe is CVE-2012-3495?
Severity scoring for CVE-2012-3495 is pending analysis. The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2012-3495?
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.

Are you affected by CVE-2012-3495?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST