CVE-2026-74327 vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()

Not scored Published 15 Aug 2026 Updated 17 Aug 2026

A local attacker can trigger a kernel crash by causing a NULL pointer dereference in the vmalloc subsystem, leading to denial of service.

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-2026-74327?

CVE-2026-74327 is a vulnerability in Linux, published on 15 Aug 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:

vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()

find_vm_area() can return NULL if the given address is not a valid vmalloc area. Check the return value before dereferencing it to avoid a kernel crash.

Which versions are affected by CVE-2026-74327?

How do I fix CVE-2026-74327?

Apply the vendor's patch.

Is CVE-2026-74327 being exploited?

There is no known exploitation of CVE-2026-74327 in the wild and no public exploit code.

Sources

Also known as BELL-CVE-2026-74327, DEBIAN-CVE-2026-74327, GHSA-fcv5-2rgw-v385, UBUNTU-CVE-2026-74327.