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Use After Free Affecting systemd-devel package, versions <0:219-78.amzn2.0.20

high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.21% (60th percentile)
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NVD
9.8 critical
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Red Hat
9.8 critical

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  • Snyk ID SNYK-AMZN2-SYSTEMDDEVEL-3042681
  • published 12 Oct 2022
  • disclosed 9 Sep 2022
Report a new vulnerability Found a mistake?

Introduced: 9 Sep 2022

CVE-2022-2526 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 systemd-devel to version 0:219-78.amzn2.0.20 or higher.
This issue was patched in ALAS2-2022-1854.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd-devel package and not the systemd-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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.