CVE-2026-31544
Published: April 24, 2026· Updated: Apr 28, 2026
Official Description
In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_scmi: Fix NULL dereference on notify error path
Since commit b5daf93b809d1 ("firmware: arm_scmi: Avoid notifier
registration for unsupported events") the call chains leading to the helper
__scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to
get an handler for the requested event key, while the current helper can
still return a NULL when no handler could be found or created.
Fix by forcing an ERR_PTR return value when the handler reference is NULL.
Technical Analysis
CVE-2026-31544 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (3)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-31544 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts