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CVE-2015-8340

14
FAUCET Score

CVE-2015-8340 describes a denial-of-service vulnerability in Xen versions 3.2.x through 4.6.x, where the memory_exchange function fails to properly release locks. This flaw could allow a guest OS administrator to trigger a deadlock or host crash. The vulnerability has a CVSS score of 4.7, indicating a low attack complexity and local access vector, with a high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.2.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.0:*:*:*:*:*:*:*
3.2.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.1:*:*:*:*:*:*:*
3.2.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.2:*:*:*:*:*:*:*
3.2.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.3:*:*:*:*:*:*:*
3.3.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.7MEDIUM

AV:L/AC:M/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 49th percentile among its peer group of 1,595 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, 0.0 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

Patch Available

Vendor Patches (2)

citrixpatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2015-8340Moderate

xen: XENMEM_exchange error handling may cause DoS to host

Dec 8, 2015

References

security.gentoo.org / glsa/201604-03
support.citrix.com / article/CTX203451
Patch
debian.org / security/2016/dsa-3519
securityfocus.com / bid/79038
securitytracker.com / id/1034391
xenbits.xen.org / xsa/advisory-159.html
Vendor Advisory