SB2026061085 - NULL pointer dereference in Linux kernel mm

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-46284)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2774bcf714739cc6bb86f8812167bb9fbda70f6a
• https://git.kernel.org/stable/c/357c6d084b6137ae640209c5bfd01180f985c015
• https://git.kernel.org/stable/c/c45b354911d01565156e38d7f6bc07edb51fc34c