CVE-2012-3494 json
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…
published 2012-11-23 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-3450
- cvss
- 2.1
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- xen Debian 14, Debian 13, Debian 12 4.1.3-2
debian advisories DEBIAN-CVE-2012-3494
- support.citrix.com/article/CTX134708 advisory
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2012-3494 updated cvss 5.5
kernel: xen: hypercall set_debugreg vulnerability
-
Red Hat Enterprise Linux 5 kernel-xennot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-264 Permissions, Privileges, and Access Controls
References
-
support.citrix.com
/article/CTX134708
patch, vendor-advisory
-
security.gentoo.org
/glsa/glsa-201309-24.xml
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00005.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-11/msg00017.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00012.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00018.html
vendor-advisory
-
security.gentoo.org
/glsa/201604-03
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00003.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00001.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00004.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-11/msg00018.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2012-09/msg00017.html
vendor-advisory
-
debian.org
/security/2012/dsa-2544
vendor-advisory
-
secunia.com
/advisories/50530
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/50472
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/55082
third-party-advisory
-
secunia.com
/advisories/51413
third-party-advisory
- wiki.xen.org /wiki/Security_Announcements#XSA-12_hypercall_set_debugreg_vulnerability
- bugzilla.redhat.com /show_bug.cgi?id=851139
-
securityfocus.com
/bid/55400
vdb-entry
-
openwall.com
/lists/oss-security/2012/09/05/5
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/78265
vdb-entry
-
lists.xen.org
/archives/html/xen-announce/2012-09/msg00000.html
mailing-list
-
osvdb.org
/85197
vdb-entry
-
securitytracker.com
/id?1027479
vdb-entry
Sources
- CVE List CVE-2012-3494
- NVD CVE-2012-3494
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.