CVE-2026-64466 rust_binder: clear freeze listener on node removal
A local attacker can trigger a memory leak in the Linux kernel binder driver by removing a node without clearing its freeze listener, potentially causing 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-2026-64466?
CVE-2026-64466 is a memory corruption 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:
rust_binder: clear freeze listener on node removal
Generally userspace is supposed to explicitly clear freeze listeners before they drop the refcount on the node ref to zero, but there's nothing forcing that. Currently, in this scenario the freeze listener remains in the freeze_listeners rbtree and in the remote node's freeze listener list, even though the ref for which the listener is registered is gone. This could potentially lead to a memory leak due to a refcount cycle. Thus, remove the freeze listener in this scenario.
Which versions are affected by CVE-2026-64466?
How do I fix CVE-2026-64466?
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-2026-64466 being exploited?
There is no known exploitation of CVE-2026-64466 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-64466, DEBIAN-CVE-2026-64466, GHSA-5qhr-mh6g-f94h, ROOT-OS-UBUNTU-2204-CVE-2026-64466, UBUNTU-CVE-2026-64466.