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CVE-2012-3494

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix...

2.1 LowFix available

CVE-2012-3494 is a low vulnerability (CVSS 2.1) in Citrix Xenserver, published September 8, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 38th percentile. Fixed in xen 4.1.3-2.

Severity
2.1 LowCVSS 2.0, NVD
Exploit chance
0.44%EPSS, 38th percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
4.1.3-2xen +3 more

Description

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Exploit likelihood

0.44%Down 1.1 points since Feb 4, 2022
90%50%10%1%

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Debian:12
before 4.1.3-2
4.1.3-2
xen
Debian:13
before 4.1.3-2
4.1.3-2
xen
Debian:14
before 4.1.3-2
4.1.3-2
xen
Debian:6.0
From an advisory covering 2 CVEs
before 4.0.1-5.4, plus listed versions
4.0.1-24.0.1-44.0.1-54.0.1-5.14.0.1-5.24.0.1-5.3
4.0.1-5.4

What each source reports

NVD Score used2.1

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Record
CVE-2012-3494
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-264
Updated
2026-11-02
CVE ListNo score

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Record
CVE-2012-3494
Updated
2026-11-02
EUVDEUVD-2012-3450No score

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Record
EUVD-2012-3450
Updated
2026-11-03
GitHub AdvisoriesGHSA-6p48-jg39-2mq7No score

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix...

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Record
GHSA-6p48-jg39-2mq7
Updated
2026-11-02
OSVNo score

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Record
CVE-2012-3494
Updated
2026-11-02
OSVDEBIAN-CVE-2012-3494No score

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

Record
DEBIAN-CVE-2012-3494
Updated
2026-11-02

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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