Use After Free Affecting systemd-libs package, versions <0:219-78.el7_9.7


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.21% (61st percentile)

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  • Snyk IDSNYK-CENTOS7-SYSTEMDLIBS-2988603
  • published20 Aug 2022
  • disclosed19 Aug 2022

Introduced: 19 Aug 2022

CVE-2022-2526  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:7 systemd-libs to version 0:219-78.el7_9.7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd-libs package and not the systemd-libs package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.

CVSS Scores

version 3.1