CVE-2012-3494

15

FAUCET Score

CVE-2012-3494 describes a denial-of-service vulnerability affecting Xen 4.0, 4.1, and 4.2, as well as Citrix XenServer 6.0.2 and earlier, specifically on x86-64 systems. A local guest OS user can trigger a host crash by manipulating the DR7 debug control register through the set_debugreg hypercall. This vulnerability has a low severity rating (CVSS 2.1) due to its local attack vector and limited impact to denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 6.0.2CPE matchmatch criteria	cpe:2.3:a:citrix:xenserver::-:::::x64:
		<= 6.0.2CPE matchmatch criteria	cpe:2.3:a:citrix:xenserver::-:::::x86:
		4.0.0CPE matchmatch criteria	cpe:2.3:o:xen:xen:4.0.0:-:::::x64:*
		4.0.0CPE matchmatch criteria	cpe:2.3:o:xen:xen:4.0.0:-:::::x86:*
		4.1.0CPE matchmatch criteria	cpe:2.3:o:xen:xen:4.1.0:-:::::x64:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

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

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Exploitability Score

3.9

Impact Score

2.9

CvssVersion

2.0

Exploit Intelligence

EPSS Score

0.44%

Probability of exploitation in next 30 days

EPSS Percentile

35.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0044 is in the 66th percentile among its peer group of 2,096 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 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 (1)

citrixpatch availablevia nvd_reference

Vendor Advisories (1)

redhatCVE-2012-3494Moderate

kernel: xen: hypercall set_debugreg vulnerability

References

lists.opensuse.org / opensuse-security-announce/2012-09/msg00001.html

lists.opensuse.org / opensuse-security-announce/2012-09/msg00003.html

lists.opensuse.org / opensuse-security-announce/2012-09/msg00004.html

lists.opensuse.org / opensuse-security-announce/2012-09/msg00005.html

lists.opensuse.org / opensuse-security-announce/2012-09/msg00012.html

lists.opensuse.org / opensuse-security-announce/2012-09/msg00017.html

lists.opensuse.org / opensuse-security-announce/2012-09/msg00018.html

lists.opensuse.org / opensuse-security-announce/2012-11/msg00017.html

lists.opensuse.org / opensuse-security-announce/2012-11/msg00018.html

lists.xen.org / archives/html/xen-announce/2012-09/msg00000.html

osvdb.org / 85197

bugzilla.redhat.com / show_bug.cgi

secunia.com / advisories/50472

Vendor Advisory

secunia.com / advisories/50530

Vendor Advisory

secunia.com / advisories/51413

secunia.com / advisories/55082

security.gentoo.org / glsa/glsa-201309-24.xml

exchange.xforce.ibmcloud.com / vulnerabilities/78265

security.gentoo.org / glsa/201604-03

support.citrix.com / article/CTX134708

PatchVendor Advisory

wiki.xen.org / wiki/Security_Announcements

debian.org / security/2012/dsa-2544

openwall.com / lists/oss-security/2012/09/05/5

securityfocus.com / bid/55400

securitytracker.com / id