NULL pointer dereference in Linux kernel - CVE-2026-46092
Published: May 27, 2026
Vulnerability identifier: #VU132402
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-2026-46092
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 the rtw88 PCI probing routine when probing an 8821CE device on a root bus without an upstream PCI bridge. A local user can install or attach a device in a crafted PCI topology to cause a denial of service.
The issue is triggered only on systems where the 8821CE device is present on a root bus and no upstream PCI-to-PCI bridge exists.
How to mitigate CVE-2026-46092
Install security update from vendor's repository.