CVE-2026-40223

Name: CVE-2026-40223
Creator: NVD / NIST
Published: 2026-04-10T16:16:32.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.09%

Last modified Jun 17, 2026

CVE-2026-40223 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In systemd 258 before 260, a local unprivileged user can trigger an assert when a Delegate=yes and User=<unset> unit exists and is running.. EPSS estimates a 0.09% chance of exploitation in the next 30 days.

Description

In systemd 258 before 260, a local unprivileged user can trigger an assert when a Delegate=yes and User=<unset> unit exists and is running.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.09%

0.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-696

Affected Software

Vendor	Product	Versions
Systemd Project	Systemd	>= 258, < 260

References

https://github.com/systemd/systemd/security/advisories/GHSA-x4h8-rrrg-q78fVendor Advisory

Timeline

Published: Apr 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-40223?

In systemd 258 before 260, a local unprivileged user can trigger an assert when a Delegate=yes and User=<unset> unit exists and is running.

How severe is CVE-2026-40223?

CVE-2026-40223 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.09% probability of exploitation in the next 30 days.

How do I fix CVE-2026-40223?

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-2026-40223?

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

Scan your code now

Source: NVD / NIST