What is CVE-2026-40227?

CVE-2026-40227 is a medium-severity vulnerability in Systemd, classified under CWE-1025. CVSS score: 6.2/10. Published 2026-04-10.

How severe is CVE-2026-40227?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in Systemd

CVE-2026-40227

In systemd 260 before 261, a local unprivileged user can trigger an assert via an IPC API call with an array or map that has a null element.

Published 2026-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (20.3th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Systemd — versions 260
Systemd Project — versions 260

Weakness classification (CWE)

CWE-1025

References

github.com/systemd/systemd/security/advisories/GHSA-848h-497j-8vjq (Vendor Advisory)

Frequently asked questions

What is CVE-2026-40227?: CVE-2026-40227 is a medium-severity vulnerability in Systemd, classified under CWE-1025. CVSS score: 6.2/10. Published 2026-04-10.
How severe is CVE-2026-40227?: Medium severity. CVSS v3 base score is 6.2 out of 10.