CVE-2026-40227 Details
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.
A denial-of-service vulnerability has been identified in systemd versions 260 prior to 261. This issue allows a local unprivileged user to cause the systemd process (PID 1) to freeze execution by sending an inter-process communication (IPC) API call that includes an array or map with null elements. The vulnerability arises from a change introduced in systemd version 260, which improperly handles such data, leading to an assertion failure that halts processing.
Users can upgrade to systemd versions 260.1 or 261 to address this vulnerability. Alternatively, the access control of the varlink socket `/run/systemd/io.systemd.Manager` can be changed to restrict access to root only.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/systemd/systemd/security/advisories/GHSA-848h-497j-8vjq | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1025 | Comparison Using Wrong Factors | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| systemd project systemd | 260 - |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 14, 2026 | Initial Analysis | [email protected] |
| Apr 10, 2026 | New CVE Received | [email protected] |