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…

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.

Scores

EPSS (exploitation in 30 days)

0.44% · top 62% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.1.

Weakness

• n/a
• CWE-264 (opens in a new tab)

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)

Record last updated 6 Aug 2024, 20:05 UTC.