All vulnerabilities

Servers and applications

CVE-2021-28706

guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the…

Severity
High 8.6
Published
24 Nov 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.12
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • From 3.2 before 4.12

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-28706
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-28706