RHSA-2021:2724: Important: systemd security update

Published Jul 20, 2021
·
Updated

The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit.<br>Security Fix(es):<br><li> systemd: uncontrolled allocation on the stack in function unitnamepathescape leads to crash (CVE-2021-33910)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

64 affected componentsFixes available
redhat/systemd<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-container<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-container<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-container-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-container-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-debugsource<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-debugsource<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-devel<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-devel<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-journal-remote<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-journal-remote-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-journal-remote-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-libs<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-libs<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-libs-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-libs-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-pam<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-pam-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-pam-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-tests<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-tests-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-tests-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-udev<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-udev-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-udev-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-journal-remote<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-pam<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-tests<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-udev<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-container<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-container-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-debugsource<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-devel<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-journal-remote<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-journal-remote-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-libs<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-libs-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-pam<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-pam-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-tests<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-tests-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-udev<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd-udev-debuginfo<239-18.el8_1.8
239-18.el8_1.8
redhat/systemd<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-container<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-container-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-debugsource<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-devel<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-journal-remote<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-journal-remote-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-libs<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-libs-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-pam<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-pam-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-tests<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-tests-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-udev<239-18.el8_1.8.aa
239-18.el8_1.8.aa
redhat/systemd-udev-debuginfo<239-18.el8_1.8.aa
239-18.el8_1.8.aa

Remediation

Event History

Jul 17, 2025
Advisory Published
via Red Hat·04:02 AM
Data Sourced
via Red Hat·04:02 AM
RemedyDescriptionAffected Software
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Frequently Asked Questions

1

What is the severity of RHSA-2021:2724?

The severity of RHSA-2021:2724 is classified as important.

2

How do I fix RHSA-2021:2724?

You can fix RHSA-2021:2724 by updating the affected systemd packages to version 239-18.el8_1.8.

3

Which systems are affected by RHSA-2021:2724?

RHSA-2021:2724 affects various systems running systemd versions below 239-18.el8_1.8.

4

What are the main vulnerabilities addressed in RHSA-2021:2724?

RHSA-2021:2724 addresses multiple vulnerabilities within systemd that may affect system stability and security.

5

When was RHSA-2021:2724 released?

RHSA-2021:2724 was released as part of Red Hat's security advisory on a specific date in 2021.

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