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.
Published 2021-11-24 01:15:08
Updated 2024-02-04 08:15:09
Source Xen Project
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-28706

Probability of exploitation activity in the next 30 days: 0.25%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 64 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-28706

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.8
HIGH AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
NIST
8.6
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
3.9
4.0
NIST

CWE ids for CVE-2021-28706

  • The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-28706

Products affected by CVE-2021-28706

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