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Red Hat: CVE-2021-3759: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (Multiple Advisories)

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Red Hat: CVE-2021-3759: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/10/2022
Created
05/14/2022
Added
05/13/2022
Modified
03/13/2024

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2021-3759
  • RHSA-2022:1975
  • RHSA-2022:1988

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