CVE-2021-28706

Published: 24 November 2021

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 established upper bound.

Priority

Medium

CVSS 3 base score: 8.6

Status

Notes

hypervisor packages are in universe. For
issues in the hypervisor, add appropriate
tags to each section, ex:
Tags_xen: universe-binary

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28706
• https://xenbits.xen.org/xsa/advisory-385.html
• NVD
• Launchpad
• Debian

Bugs