Unrated severityNVD Advisory· Published Nov 23, 2012· Updated Jun 16, 2026
CVE-2012-3495
CVE-2012-3495
Description
The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
13cpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*range: <=6.0.2
- cpe:2.3:a:citrix:xenserver:5.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:5.5:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:5.6:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:5.6:fp1:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:5.6:sp2:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:*
- (no CPE)range: <=6.0.2
Patches
Vulnerability mechanics
References
16- lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.htmlnvd
- lists.xen.org/archives/html/xen-announce/2012-09/msg00001.htmlnvd
- secunia.com/advisories/51413nvd
- secunia.com/advisories/55082nvd
- security.gentoo.org/glsa/glsa-201309-24.xmlnvd
- support.citrix.com/article/CTX134708nvd
- wiki.xen.org/wiki/Security_Announcementsnvd
- www.openwall.com/lists/oss-security/2012/09/05/6nvd
- www.securityfocus.com/bid/55406nvd
- www.securitytracker.com/idnvd
- xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593nvd
- security.gentoo.org/glsa/201604-03nvd
News mentions
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