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CVE-2017-12136

24
FAUCET Score

CVE-2017-12136 is a race condition vulnerability in Xen versions 4.6.x through 4.9.x, affecting various Xen-based products from Citrix and Debian. This flaw allows a local guest OS administrator to trigger a denial of service (host crash) or potentially escalate privileges on the host system. With a CVSS v3 score of 7.8 (High), exploitation requires low privileges and high attack complexity, but can lead to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.6.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*
4.6.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*
4.6.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*
4.6.4CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.4:*:*:*:*:*:*:*
4.6.5CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.1
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 59th percentile among its peer group of 1,516 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

citrixpatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-12136Important

xen: grant_table: Race conditions with maptrack free list handling (XSA-228)

Aug 15, 2017

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
security.gentoo.org / glsa/201801-14
Third Party Advisory
support.citrix.com / article/CTX225941
PatchThird Party Advisory
debian.org / security/2017/dsa-3969
Third Party Advisory
openwall.com / lists/oss-security/2017/08/15/3
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/100346
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039175
Third Party AdvisoryVDB Entry
xenbits.xen.org / xsa/advisory-228.html
PatchVendor Advisory