CVE-2012-3495

    Dashboard / Vulnerabilities / CVE-2012-3495

    CVE-2012-3495

    Published: 23 Nov 2012Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

    References: http://secunia.com/advisories/51413, http://secunia.com/advisories/55082, http://security.gentoo.org/glsa/glsa-201309-24.xml, https://security.gentoo.org/glsa/201604-03, http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html, http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html, http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html, http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html, http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html, http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html, http://support.citrix.com/article/CTX134708, http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability, http://www.openwall.com/lists/oss-security/2012/09/05/6, http://www.securityfocus.com/bid/55406, http://www.securitytracker.com/id?1027480, http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High