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Vulnerability record · CVE-2021-3669 · published 26 August 2022

CVE-2021-3669: Linux kernel uncontrolled resource consumption vulnerability

Linux · Linux Kernel

A flaw was found in the Linux kernel. Measuring usage of the shared memory does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.

5.5 CVSS 3.1 Medium EPSS 0.29% · top 80.3% CWE-400 · Uncontrolled resource consumptionCWE-770 · Allocation without limits
5.5CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
23Affected product versions listed by NVD
9References
17 Jun 2026Last modified by NVD

Description

A flaw was found in the Linux kernel. Measuring usage of the shared memory does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

23 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2021-3669 Issue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1980619 Issue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1986473 Issue TrackingPermissions Required
https://security-tracker.debian.org/tracker/CVE-2021-3669 Issue TrackingThird Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3669 Issue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1980619 Issue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1986473 Issue TrackingPermissions Required
https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
https://security-tracker.debian.org/tracker/CVE-2021-3669 Issue TrackingThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-3669), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.