Is CVE-2026-40227 in the CISA KEV catalog?

No. CVE-2026-40227 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-40227?

CVE-2026-40227 has a CVSS v3 base score of 6.2 (MEDIUM).

What is the EPSS score for CVE-2026-40227?

CVE-2026-40227 has an EPSS score of 0.20% (10th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40227?

Upgrade systemd on debian unstable to 260.1-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-40227

MEDIUM

6.2

CVSS v3

NVD

Description

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.

CWE-1025

How to fix

Remediation Available

systemdDebian

Fixed in:260.1-1CVE-2026-40227

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.20%probability of exploitation in 30 days

10thpercentile

Low risk: more likely to be exploited than 10% of all known CVEs.

References

Vendor Advisory1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-14.