CVE-2022-2526

Name: CVE-2022-2526
Creator: NVD / NIST
Published: 2022-09-09T15:15:10.107+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2022-2526 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

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

9.8/10

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

EPSS Probability

1.05%

60.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Systemd Project	Systemd	240
Netapp	Active Iq Unified Manager	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H410s Firmware	All versions

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
Status: Modified

Frequently Asked Questions

What is CVE-2022-2526?

How severe is CVE-2022-2526?

CVE-2022-2526 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2022-2526?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-2526?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST