CVE-2026-46284 mm/hugetlb: fix early boot crash on parameters without '=' separator
A local attacker with kernel command line access can cause a denial of service by specifying hugepage parameters without an equals sign, triggering a null pointer dereference during boot.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46284?
CVE-2026-46284 is a medium-severity vulnerability in Linux kernel, published on 8 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mm/hugetlb: fix early boot crash on parameters without '=' separator
If hugepages, hugepagesz, or default_hugepagesz are specified on the kernel command line without the '=' separator, early parameter parsing passes NULL to hugetlb_add_param(), which dereferences it in strlen() and can crash the system during early boot.
Reject NULL values in hugetlb_add_param() and return -EINVAL instead.
Weakness: CWE-476
Which versions are affected by CVE-2026-46284?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46284?
Apply the vendor's patch.
Is CVE-2026-46284 being exploited?
There is no known exploitation of CVE-2026-46284 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46284, DEBIAN-CVE-2026-46284, GHSA-wf92-393r-9p92, UBUNTU-CVE-2026-46284.