NULL pointer dereference in Linux kernel - CVE-2026-64227
Published: July 27, 2026
Vulnerability identifier: #VU139777
CSH Severity: Low
CVSS v4.0: 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-2026-64227
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of a NULL pointer in ACPI platform driver probe handlers when probing a platform device without an ACPI companion object. A local user can force a platform driver to match a device that does not match its device ID list to cause a denial of service.
The issue affects core ACPI-related platform drivers and can be triggered through driver override behavior.
How to mitigate CVE-2026-64227
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51
- https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859
- https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc
- https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff
- https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406