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CVE-2015-7971

UnknownEPSS 0.43%

Last modified

CVE-2015-7971 is a vulnerability of currently unknown severity. Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted (1) HYPERCALL_xenoprof_op hypercalls, which are not properly handled in the do_xenoprof_op function in common/xenoprof.c, or (2) HYPERVISOR_xenpmu_op hypercalls, which are not properly handled in the do_xenpmu_op function in arch/x86/cpu/vpmu.c.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted (1) HYPERCALL_xenoprof_op hypercalls, which are not properly handled in the do_xenoprof_op function in common/xenoprof.c, or (2) HYPERVISOR_xenpmu_op hypercalls, which are not properly handled in the do_xenpmu_op function in arch/x86/cpu/vpmu.c.

Metrics

EPSS Probability
0.43%

34.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
XenXen3.2.0
XenXen3.2.1
XenXen3.2.2
XenXen3.2.3
XenXen3.3.0
XenXen3.3.1
XenXen3.3.2
XenXen3.4.0
XenXen3.4.1
XenXen3.4.2
XenXen3.4.3
XenXen3.4.4
XenXen4.0.0
XenXen4.0.1
XenXen4.0.2
XenXen4.0.3
XenXen4.0.4
XenXen4.1.0
XenXen4.1.1
XenXen4.1.2
XenXen4.1.3
XenXen4.1.4
XenXen4.1.5
XenXen4.1.6.1
XenXen4.2.0
XenXen4.2.1
XenXen4.2.2
XenXen4.2.3
XenXen4.3.0
XenXen4.3.1
XenXen4.3.2
XenXen4.3.4
XenXen4.4.0
XenXen4.4.1
XenXen4.5.0
XenXen4.5.1
XenXen4.6.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2015-7971?
Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted (1) HYPERCALL_xenoprof_op hypercalls, which are not properly handled in the do_xenoprof_op function in common/xenoprof.c, or (2) HYPERVISOR_xenpmu_op hypercalls, which are not properly handled in the do_xenpmu_op function in arch/x86/cpu/vpmu.c.
How severe is CVE-2015-7971?
Severity scoring for CVE-2015-7971 is pending analysis. The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2015-7971?
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.

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Source: NVD / NIST