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Advisory severityMedium5.5Red Hat Linux

Medium [CVE-2021-3759] 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 medium-severity Red Hat Linux advisory covers CVE-2021-3759 affecting Red Hat Enterprise Linux 8, Red Hat package: kernel-rt.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2021-3759 Source published Source updated

VulniPulse record published

CVE-2021-3759
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

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Summary

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. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-770. Affected Red Hat products: Red Hat Enterprise Linux 8.

Red Hat fixing advisory: RHSA-2022:1975, RHSA-2022:1988.

Affected products named by the advisory: Red Hat package: kernel-rt.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 17 hours ago·verify at source

Fixed versions
  • kernel-rt-0:4.18.0-372.9.1.rt7.166.el8
  • kernel-0:4.18.0-372.9.1.el8
  • RHSA-2022:1975
  • RHSA-2022:1988

Official advisory · high-confidence parse· fetched 17 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Official advisory · high-confidence parse· fetched 17 hours ago·verify at source

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