#VU124467 NULL Pointer Dereference in Linux kernel - CVE-2026-23369
Published: March 25, 2026
Vulnerability identifier: #VU124467
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23369
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the i2c_i801 driver when handling ACPI I/O operations during system boot. A local user can trigger concurrent access to the i801 ACPI I/O handler, leading to a situation where the bus lock mechanism attempts to access a deregistered memory region, resulting in a kernel NULL pointer dereference and system crash.
Exploitation occurs during early boot when multiple udev threads concurrently collect device information, and no additional privileges beyond standard system access are required.
Remediation
Install security update from vendor's repository.