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CVE-2017-12134

22
FAUCET Score

CVE-2017-12134 is a high-severity vulnerability affecting Xen and Citrix XenServer that could allow local guest OS users to corrupt block device data. This flaw stems from incorrect block I/O merge-ability calculations, potentially leading to sensitive memory disclosure, denial of service, or host OS privilege escalation. With a CVSS score of 8.8, it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
6.0.2CPE matchmatch criteria
cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*
6.2.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 80th percentile among its peer group of 17,070 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

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

Vendor Advisories (1)

redhatCVE-2017-12134Moderate

xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)

Aug 15, 2017

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingMitigationPatchThird Party Advisory
security.gentoo.org / glsa/201801-14
support.citrix.com / article/CTX225941
PatchThird Party Advisory
usn.ubuntu.com / 3655-1
usn.ubuntu.com / 3655-2
debian.org / security/2017/dsa-3981
openwall.com / lists/oss-security/2017/08/15/4
Mailing ListMitigationThird Party Advisory
securityfocus.com / bid/100343
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039176
Third Party AdvisoryVDB Entry
xenbits.xen.org / xsa/advisory-229.html
MitigationPatchVendor Advisory