Vulnerability Monitor

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CVE-2014-7156

The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors.

Security Impact Summary

CVE-2014-7156 is a security vulnerability that . Impacting 1 product from xen organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2014, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2014-10-02T14:55:05.167

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 3.3 (LOW)

CVSSv2 Vector

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

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

6.5

Impact Score

2.9

Weaknesses

Type: Primary
CWE-264

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	xen	xen	3.3.0	Yes
Operating System	xen	xen	3.3.1	Yes
Operating System	xen	xen	3.3.2	Yes
Operating System	xen	xen	4.1.0	Yes
Operating System	xen	xen	4.1.1	Yes
Operating System	xen	xen	4.1.2	Yes
Operating System	xen	xen	4.1.3	Yes
Operating System	xen	xen	4.1.4	Yes
Operating System	xen	xen	4.1.5	Yes
Operating System	xen	xen	4.1.6.1	Yes
Operating System	xen	xen	4.2.0	Yes
Operating System	xen	xen	4.2.1	Yes
Operating System	xen	xen	4.2.2	Yes
Operating System	xen	xen	4.2.3	Yes
Operating System	xen	xen	4.3.0	Yes
Operating System	xen	xen	4.3.1	Yes
Operating System	xen	xen	4.4.0	Yes
Operating System	xen	xen	4.4.0	Yes
Operating System	xen	xen	4.4.1	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html ([email protected])
http://secunia.com/advisories/61500 ([email protected])
http://secunia.com/advisories/61858 ([email protected])
http://secunia.com/advisories/61890 ([email protected])
http://security.gentoo.org/glsa/glsa-201412-42.xml ([email protected])
http://support.citrix.com/article/CTX200218 ([email protected])
http://www.debian.org/security/2014/dsa-3041 ([email protected])
http://www.securityfocus.com/bid/70062 ([email protected])
http://www.securitytracker.com/id/1030889 ([email protected])
http://xenbits.xen.org/xsa/advisory-106.html Patch, Vendor Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61500 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61858 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61890 (af854a3a-2127-422b-91ae-364da2661108)
http://security.gentoo.org/glsa/glsa-201412-42.xml (af854a3a-2127-422b-91ae-364da2661108)
http://support.citrix.com/article/CTX200218 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2014/dsa-3041 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/70062 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1030889 (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-106.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For xen's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.