CVE-2026-40223

Publication date 10 April 2026

Last updated 6 June 2026

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
systemd	26.04 LTS resolute	Not affected
	25.10 questing	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

introduced in 258 with: https://github.com/systemd/systemd/commit/59857b672ca6a3a9253ef9c888172c5e68243160 fixed in 259.2

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
systemd	Upstream: 05f5156 Upstream: 36afb08

Severity score breakdown

Parameter	Value
Base score	4.7 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Other references

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