CVE-2015-7971
EPSS 0.07%
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.
How to fix CVE-2015-7971
To remediate CVE-2015-7971, upgrade the affected package to a fixed version below.
- Debian/xen—upgrade to 4.6.0-1 or later
Is CVE-2015-7971 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.6.0-1