CVE-2021-3759

MediumCVSS 5.5/10Last modified Oct 14, 2026

Description

A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores. This flaw allows a local user to starve the resources, causing a denial of service. The highest threat from this vulnerability is to system availability.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400 CWE-770

Affected software

Vendor	Product	Versions
n/a	kernel	Fixed in Linux kernel 5.15-rc1
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	< V1.1

References

https://access.redhat.com/security/cve/CVE-2021-3759Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1999675Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00031.htmlMailing List, Third Party Advisory
https://lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive%40gmail.com/
https://access.redhat.com/security/cve/CVE-2021-3759Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1999675Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00031.htmlMailing List, Third Party Advisory
https://lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive%40gmail.com/
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Timeline

Published: Aug 23, 2022
Last modified: Oct 14, 2026
NVD status: Modified

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