UpHeron
All vulnerabilities

Servers and applications

CVE-2014-7155

The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.

Severity
Medium 5.8
Published
2 Oct 2014
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1% in the next 30 daysHigher than 62% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-264
Attack
From the same local network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:A/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Version 4.4.0
  • Version 4.4.0-rc1
  • Version 4.3.1
  • Version 4.3.0
All 38 release lines
  • Every version up to 4.4.0
  • Version 3.0.2
  • Version 3.0.3
  • Version 3.0.4
  • Version 3.1.3
  • Version 3.1.4
  • Version 3.2.0
  • Version 3.2.1
  • Version 3.2.2
  • Version 3.2.3
  • Version 3.3.0
  • Version 3.3.1
  • Version 3.3.2
  • Version 3.4.0
  • Version 3.4.1
  • Version 3.4.2
  • Version 3.4.3
  • Version 3.4.4
  • Version 4.0.0
  • Version 4.0.1
  • Version 4.0.2
  • Version 4.0.3
  • Version 4.0.4
  • Version 4.1.0
  • Version 4.1.1
  • Version 4.1.2
  • Version 4.1.3
  • Version 4.1.4
  • Version 4.1.5
  • Version 4.1.6.1
  • Version 4.2.0
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3
  • Version 4.3.0
  • Version 4.3.1
  • Version 4.4.0-rc1
  • Version 4.4.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2014-7155
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2014-7155