CVE-2026-64013 ACPI: button: Fix ACPI GPE handler leak during removal
A memory leak in the Linux kernel ACPI button driver can cause a kernel crash if the device is removed and re-probed, 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-2026-64013?
CVE-2026-64013 is a medium-severity memory corruption vulnerability in Linux kernel, published on 19 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: button: Fix ACPI GPE handler leak during removal
Commit a7e23ec17fee ("ACPI: button: Install notifier for system events as well") changed the ACPI notify handler type for ACPI buttons to ACPI_ALL_NOTIFY, but it forgot to update acpi_button_remove() to reflect that change. This leads to leaking the notify handler past driver removal, which may cause a kernel crash to occur if ACPI notify on the given device is triggered after removing the driver, and causes a subsequent probe of the given device with the same driver to fail.
Address this by updating the acpi_remove_notify_handler() call in acpi_button_remove() as appropriate.
Weakness: CWE-401
Which versions are affected by CVE-2026-64013?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64013?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-64013 being exploited?
There is no known exploitation of CVE-2026-64013 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64013, DEBIAN-CVE-2026-64013, GHSA-f2x8-xrw8-f2m5, UBUNTU-CVE-2026-64013.