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Servers and applications

CVE-2018-15468

An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case…

Severity
Medium 6.0
Published
17 Aug 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.3% in the next 30 daysHigher than 27% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Every version up to 4.11.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-15468
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-15468