CVE-2022-2526

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
n/a	systemd-resolved	systemd 240

References

https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27cPatch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20221111-0005/Third Party Advisory
https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27cPatch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20221111-0005/Third Party Advisory

Timeline

Published: Sep 9, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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