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CVE-2015-8615

15
FAUCET Score

CVE-2015-8615 describes a denial-of-service vulnerability in Xen 4.6, specifically within the hvm_set_callback_via function. This flaw allows local HVM guest OS users to trigger excessive printk console messages by repeatedly changing the callback method (HVM_PARAM_CALLBACK_IRQ), leading to a system crash. Rated as Medium severity (CVSS 5.0), the attack requires local access and has a low impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.6.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.0MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.1
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.16%
Probability of exploitation in next 30 days
EPSS Percentile
64.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0116 is in the 78th percentile among its peer group of 21,977 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2015-8615Low

xen: Unintentional logging upon guest changing callback method on x86

Dec 21, 2015

References

securityfocus.com / bid/79644
securitytracker.com / id/1034512
xenbits.xen.org / xsa/advisory-169.html
Vendor Advisory