UBUNTU-CVE-2021-28706
Dashboard / Vulnerabilities / UBUNTU-CVE-2021-28706
Summary:
Details: 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.
References: https://ubuntu.com/security/CVE-2021-28706, https://xenbits.xen.org/xsa/advisory-385.html, https://www.cve.org/CVERecord?id=CVE-2021-28706
Affected packages
Package
Name: xen
Purl: pkg:deb/ubuntu/xen?arch=source&distro=xenial
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
4.5.1-0ubuntu1
4.5.1-0ubuntu2
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
