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Servers and applications

CVE-2014-9066

Xen 4.4.x and earlier, when using a large number of VCPUs, does not properly handle read and write locks, which allows local x86 guest users to cause a denial of service (write denial or NMI watchdog timeout and host crash) via a large number of read requests, a different vulnerability than CVE-2014-9065.

Severity
Medium 4.7
Published
9 Dec 2014
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.4% in the next 30 daysHigher than 34% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-17
Attack
Needs local access · No login needed
Attacker can
Take it down
CVSS vector
AV:L/AC:M/Au:N/C:N/I:N/A:C
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Every version up to 4.4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2014-9066
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2014-9066