8.6

CVE-2021-28706: debian debian_linux

CVSS: 8.6v3.1HighModified
AliasesALPINE-CVE-2021-28706UBUNTU-CVE-2021-28706DEBIAN-CVE-2021-28706
Published 24-11-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-28706 is a high (CVSS 8.6) vulnerability in debian debian_linux. EPSS estimates a 2.23% chance of exploitation in the next 30 days, higher than 82.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (NVD)
EPSS score
2.23%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 11
DSA-5017-1OPENSUSE-SU-2021:1543-1OPENSUSE-SU-2021:3968-1SUSE-SU-2021:14848-1SUSE-SU-2021:3813-1SUSE-SU-2021:3842-1

Timeline

  1. 24-11-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

2.23%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

+0.02 pp

From 2.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Alpine1 product
  • xen≥ 3.2, < 4.13.4-r2 | ≥ 3.2, < 4.13.4-r3 | ≥ 3.2, < 4.14.5-r0 | ≥ 3.2, < 4.15.2-r0
Fedoraproject1 product
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product
  • xen≥ 4.12.0, < 4.13.0 | ≥ 4.14.x, < unspecified | xen-unstable | ≥ 4.13.0, < 4.14.0 | ≥ 3.2, < 4.12

5 vendors · 6 products

References

10 links