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CVE-2012-3494
The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on…
Low2.1EPSS 0.44%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.
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 | Low2.1 | AV:L/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 0.44% · top 62% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.1.
Weakness
Affected products
n/a
- affected n/a
References (25)
- 55082 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 50530 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_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
- SUSE-SU-2012:1135 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://wiki.xen.org/wiki/Security_Announcements#XSA-12_hypercall_set_debugreg_vulnerability (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=851139 (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2012:1572 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 50472 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 55400 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [oss-security] 20120905 Xen Security Advisory 12 (CVE-2012-3494) - hypercall set_debugreg vulnerability (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- SUSE-SU-2012:1162 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2012:1174 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- GLSA-201604-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- xen-setdebugreg-dos(78265) (opens in a new tab)vdb-entryx_refsource_XFx_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
- [Xen-announce] 20120905 Xen Security Advisory 12 (CVE-2012-3494) - hypercall set_debugreg vulnerability (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- SUSE-SU-2012:1129 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- SUSE-SU-2012:1133 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 85197 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 1027479 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_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
- DSA-2544 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_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-2012-3494)Record last updated .