CVE-2012-3494

NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 0%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
—
EG Score
0.0(none)
EPSS
35.1%
KEV
Not listed

Published

November 23, 2012

Last Modified

April 29, 2026

References (50)

Data Freshness Timeline

(refreshed 10× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-06 02:19 UTCEPSS rescore
  4. 2026-07-05 10:59 UTCOSV refresh
  5. 2026-07-05 02:26 UTCEPSS rescore
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  9. 2026-06-30 23:19 UTCEPSS rescore
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  13. 2026-06-28 04:53 UTCEPSS rescore
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  15. 2026-06-27 03:05 UTCEPSS rescore
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  17. 2026-06-25 13:46 UTCEPSS rescore
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  24. 2026-06-21 14:53 UTCEPSS rescore
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  1. 2026-06-21 01:56 UTCEPSS rescore
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  4. 2026-06-18 17:49 UTCEPSS rescore
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  6. 2026-06-17 17:49 UTCEPSS rescore
  7. 2026-06-17 17:49 UTCEPSS rescore
  8. 2026-06-16 22:05 UTCOSV refresh
  9. 2026-06-16 17:49 UTCEPSS rescore
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  11. 2026-06-15 17:44 UTCEPSS rescore
  12. 2026-06-14 23:14 UTCEPSS rescore
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  14. 2026-06-13 22:57 UTCEPSS rescore
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  16. 2026-06-11 13:56 UTCEPSS rescore
  17. 2026-06-10 22:14 UTCEPSS rescore
  18. 2026-06-10 13:18 UTCEPSS rescore
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  35. 2026-05-31 00:14 UTCEPSS rescore
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  37. 2026-05-29 13:41 UTCEPSS rescore
  38. 2026-05-29 01:46 UTCEG score recompute
  39. 2026-05-29 01:46 UTCGHSA enrichment
  40. 2026-05-28 13:42 UTCEPSS rescore
  41. 2026-05-28 13:42 UTCEPSS rescore
  42. 2026-05-27 22:48 UTCOSV refresh
  43. 2026-05-27 13:38 UTCEPSS rescore
  44. 2026-05-27 13:38 UTCEPSS rescore
  45. 2026-05-26 13:41 UTCEPSS rescore
  46. 2026-05-26 13:41 UTCEPSS rescore
  47. 2026-05-26 07:16 UTCEPSS rescore
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  49. 2026-05-26 07:16 UTCEPSS rescore
  50. 2026-05-24 16:43 UTCEPSS rescore
  51. 2026-05-22 21:15 UTCEPSS rescore
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  54. 2026-05-21 22:39 UTCEPSS rescore
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  61. 2026-05-18 21:29 UTCEPSS rescore
  62. 2026-05-18 21:29 UTCEPSS rescore

Frequently asked(4)

What is CVE-2012-3494?
CVE-2012-3494 is a none vulnerability published on November 23, 2012. 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.
When was CVE-2012-3494 disclosed?
CVE-2012-3494 was first published in the National Vulnerability Database on November 23, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-3494 actively exploited?
CVE-2012-3494 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2012-3494?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-3494, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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