What is CVE-2015-8615?

CVE-2015-8615 is a medium-severity vulnerability in Xen, classified under CWE-254. CVSS score: 5.0/10. Published 2016-01-08.

How severe is CVE-2015-8615?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Vulnerability in Xen

CVE-2015-8615

The hvm_set_callback_via function in arch/x86/hvm/irq.c in Xen 4.6 does not limit the number of printk console messages when logging the new callback method, which allows local HVM guest OS users to cause a denial of service via a large number of changes to the callback method (HVM_PARAM_CALLBACK_IRQ).

Published 2016-01-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.012 (66.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Xen — versions 4.6.0

Weakness classification (CWE)

CWE-254

References

xenbits.xen.org/xsa/advisory-169.html (Vendor Advisory)
www.securityfocus.com/bid/79644 (vdb-entry)
www.securitytracker.com/id/1034512 (vdb-entry)

Frequently asked questions

What is CVE-2015-8615?: CVE-2015-8615 is a medium-severity vulnerability in Xen, classified under CWE-254. CVSS score: 5.0/10. Published 2016-01-08.
How severe is CVE-2015-8615?: Medium severity. CVSS v3 base score is 5.0 out of 10.