NULL pointer dereference in Linux kernel - CVE-2026-64169
Published: July 20, 2026
Vulnerability identifier: #VU138450
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-2026-64169
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 error pointers in the ep93xx SPI driver DMA channel setup logic when handling DMA setup failures during device probe or later driver cleanup paths. A local user can trigger DMA setup failure conditions to cause a denial of service.
The driver may later dereference an error pointer during subsequent probe error handling or driver unbind after falling back to PIO mode.
How to mitigate CVE-2026-64169
Install security update from vendor's repository.