CVE-2021-3669: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

Debian Debian Linux: version 10.0 only; version 11.0 only
Fedoraproject Fedora: version 34 only
IBM Spectrum Copy Data Management: from 2.2.0.0, up to and including 2.2.15.0
IBM Spectrum Protect Plus: from 10.1.0, up to and including 10.1.10.2
Linux Linux Kernel: any version
Red Hat Build Of Quarkus: from 2.0, before 2.7 (fixed in 2.7)
Red Hat Codeready Linux Builder: affected versions not specified
Red Hat Developer Tools: version 1.0 only
Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only
Red Hat Enterprise Linux Aus: version 8.6 only
Red Hat Enterprise Linux For IBM Z Systems: version 8.0 only
Red Hat Enterprise Linux For IBM Z Systems Eus: version 8.6 only
Red Hat Enterprise Linux For Power Little Endian: version 8.0 only
Red Hat Enterprise Linux For Power Little Endian Eus: version 8.6 only
Red Hat Enterprise Linux For Real Time: version 8 only
Red Hat Enterprise Linux For Real Time For Nfv: version 8 only
Red Hat Enterprise Linux For Real Time For Nfv Tus: version 8.6 only
Red Hat Enterprise Linux For Real Time Tus: version 8.6 only
Red Hat Enterprise Linux Server Aus: version 8.6 only
Red Hat Enterprise Linux Server For Power Little Endian Update Services For SAP Solutions: version 8.6 only
Red Hat Enterprise Linux Server Tus: version 8.6 only
Red Hat Openshift Container Platform: version 4.6 only; version 4.7 only; version 4.9 only
Red Hat Virtualization Host: version 4.0 only

Published 2022-08-26. Last modified 2026-06-17.