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…
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Timeline
ID reserved
By redhat
- 5 months later
· 5 months later
Published
- 12 years later
· 12 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.1 | AV:L/AC:L/Au:N/C:P/I:P/A:C |
- EPSS (exploitation in 30 days)
- 0.44% · top 62% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Weakness
Affected products
n/a
- affected n/a
References (16)
- 55082 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [Xen-announce] 20120905 Xen Security Advisory 13 (CVE-2012-3495) - hypercall physdev_get_free_pirq vulnerability (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 51413 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- GLSA-201309-24 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2012:1572 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 55406 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 1027480 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- GLSA-201604-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- SUSE-SU-2012:1132 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://support.citrix.com/article/CTX134708 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20120905 Xen Security Advisory 13 (CVE-2012-3495) - hypercall physdev_get_free_pirq vulnerability (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- SUSE-SU-2012:1133 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2012:1573 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2012:1172 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2012-3495)Record last updated .