CVE-2015-2151

CVE-2015-2151 is a high-severity vulnerability in Fedoraproject Fedora with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

• Severity: High (CVSS 2.0 base score 7.2)
• EPSS exploit prediction: 1% (43rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-264
• Affected product: Fedoraproject Fedora
• Published: 2015-03-12
• Last modified: 2026-06-17

Description

The x86 emulator in Xen 3.2.x through 4.5.x does not properly ignore segment overrides for instructions with register operands, which allows local guest users to obtain sensitive information, cause a denial of service (memory corruption), or possibly execute arbitrary code via unspecified vectors.

Frequently asked questions

What is CVE-2015-2151?

The x86 emulator in Xen 3.2.x through 4.5.x does not properly ignore segment overrides for instructions with register operands, which allows local guest users to obtain sensitive information, cause a denial of service (memory corruption), or possibly execute arbitrary code via unspecified vectors.

How severe is CVE-2015-2151?

CVE-2015-2151 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2015-2151 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2151?

CVE-2015-2151 primarily affects Fedoraproject Fedora. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-2151?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-2151 published?

CVE-2015-2151 was published on 2015-03-12 and last updated on 2026-06-17.

References

• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
• http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152483.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152588.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152776.html
• http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html
• http://support.citrix.com/article/CTX200484
• http://www.debian.org/security/2015/dsa-3181
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
• http://www.securityfocus.com/bid/73015
• http://www.securitytracker.com/id/1031806
• http://www.securitytracker.com/id/1031903
• http://www1.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-423503.htm
• http://xenbits.xen.org/xsa/advisory-123.html
• https://security.gentoo.org/glsa/201604-03

Affected products (38)

• cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.2.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.2.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.2.2:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.2.3:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.1.6.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.4.0:rc1:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.4.1:-:*:*:*:*:*:*
• cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*

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