UpHeron
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Servers and applications

CVE-2014-8867

The acceleration support for the "REP MOVS" instruction in Xen 4.4.x, 3.2.x, and earlier lacks properly bounds checking for memory mapped I/O (MMIO) emulated in the hypervisor, which allows local HVM guests to cause a denial of service (host crash) via unspecified vectors.

Severity
Medium 4.9
Published
1 Dec 2014
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.5% in the next 30 daysHigher than 40% 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:L/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 3.2.0
  • Version 3.2.1
  • Version 3.2.2
  • Version 3.2.3
  • Version 4.4.0
  • Version 4.4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2014-8867
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2014-8867