CVE-2026-64511 ACPI: NFIT: core: Fix possible NULL pointer dereference
A NULL pointer dereference in the Linux kernel ACPI NFIT driver allows local attackers to cause a system crash via specific firmware notifications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64511?
CVE-2026-64511 is a vulnerability in Linux, published on 25 Jul 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:
ACPI: NFIT: core: Fix possible NULL pointer dereference
After commit 9b311b7313d6 ("ACPI: NFIT: Install Notify() handler before getting NFIT table"), acpi_nfit_probe() installs an ACPI notify handler for the NFIT device before checking the presence of the NFIT table. If that table is not there, 0 is returned without allocating the acpi_desc object and setting the driver data pointer of the NFIT device. If the platform firmware triggers an NFIT_NOTIFY_UC_MEMORY_ERROR notification on the NFIT device at that point, acpi_nfit_uc_error_notify() will dereference a NULL pointer.
Prevent that from occurring by adding an acpi_desc check against NULL to acpi_nfit_uc_error_notify().
Which versions are affected by CVE-2026-64511?
How do I fix CVE-2026-64511?
Apply the vendor's patch.
Is CVE-2026-64511 being exploited?
There is no known exploitation of CVE-2026-64511 in the wild and no public exploit code.
Sources
Also known as AZL-93885, BELL-CVE-2026-64511, DEBIAN-CVE-2026-64511, GHSA-fx53-fh8q-8mmr, ROOT-OS-UBUNTU-2204-CVE-2026-64511, UBUNTU-CVE-2026-64511.