CVE-2026-64463 usb: typec: tcpci_rt1711h: unregister TCPCI port with devres
A memory leak in the Linux kernel's RT1711H USB Type-C driver can lead to resource exhaustion and denial of service if probe operations fail.
- 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-2026-64463?
CVE-2026-64463 is a high-severity 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:
usb: typec: tcpci_rt1711h: unregister TCPCI port with devres
rt1711h_probe() registers the TCPCI port before requesting the interrupt and enabling alert interrupts. If either of those later steps fails, the probe function returns without unregistering the TCPCI port. The explicit unregister currently only happens from the remove callback.
Register a devres action immediately after tcpci_register_port() succeeds, so tcpci_unregister_port() runs on later probe failures and on driver detach. Drop the remove callback to avoid unregistering the same port twice.
This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Weakness: CWE-401
Which versions are affected by CVE-2026-64463?
How do I fix CVE-2026-64463?
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-2026-64463 being exploited?
There is no known exploitation of CVE-2026-64463 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-64463, DEBIAN-CVE-2026-64463, GHSA-fcgc-c7jf-cmfv, ROOT-OS-DEBIAN-12-CVE-2026-64463, ROOT-OS-UBUNTU-2204-CVE-2026-64463, UBUNTU-CVE-2026-64463.