UpHeron
All vulnerabilities

Servers and applications

CVE-2017-12855

Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A…

Severity
Medium 6.5
Published
15 Aug 2017
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, 11 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Version 4.9.0
  • Version 4.8.1
  • Version 4.8.0
  • Version 4.7.3
All 18 release lines
  • Version 4.5.0
  • Version 4.5.1
  • Version 4.5.2
  • Version 4.5.3
  • Version 4.5.5
  • Version 4.6.0
  • Version 4.6.1
  • Version 4.6.3
  • Version 4.6.4
  • Version 4.6.5
  • Version 4.6.6
  • Version 4.7.0
  • Version 4.7.1
  • Version 4.7.2
  • Version 4.7.3
  • Version 4.8.0
  • Version 4.8.1
  • Version 4.9.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-12855
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-12855