NULL pointer dereference in Linux kernel - CVE-2026-46284
Published: June 10, 2026
Vulnerability identifier: #VU134248
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-2026-46284
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 attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in hugetlb_add_param() in mm/hugetlb.c when parsing kernel command-line parameters without an '=' separator. A local attacker can supply a crafted kernel command-line parameter to cause a denial of service.
The issue can crash the system during early boot when hugepages, hugepagesz, or default_hugepagesz are specified without a value separator.
How to mitigate CVE-2026-46284
Install security update from vendor's repository.