Vulnerability · Published Apr 10, 2026 · Assigned by mitre
CVE-2026-40223
Medium 4.7
In plain English
A medium-severity security flaw in systemd from systemd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)<0.1%top 99.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | systemd | 260~rc1-1 | DEBIAN-CVE-2026-40223 |
| Ubuntu:22.04:LTS | systemd | no fix listed | UBUNTU-CVE-2026-40223 |
| Ubuntu:24.04:LTS | systemd | no fix listed | UBUNTU-CVE-2026-40223 |
| Ubuntu:25.10 | systemd | no fix listed | UBUNTU-CVE-2026-40223 |
| Ubuntu:26.04:LTS | systemd | no fix listed | UBUNTU-CVE-2026-40223 |
Affected products (as reported)
Weakness: CWE-696 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H