CVE-2012-3495
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.
Key facts
- CVSS score
- 6.1 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:L/AC:L/Au:N/C:P/I:P/A:C- Weakness (CWE)
- CWE-20
- EPSS score
- 0.4% (38th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2012-3451)
- Published
- November 23, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2012-3451 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- citrix / xenserver
- citrix / xenserver
- citrix / xenserver
- citrix / xenserver
- citrix / xenserver
- citrix / xenserver
- citrix / xenserver
- xen / xen
- xen / xen
- xen / xen
- xen / xen
References
- 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://secunia.com/advisories/51413
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- 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
- https://security.gentoo.org/glsa/201604-03
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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