Medium [CVE-2026-64463] unregister TCPCI port with devres
This medium-severity Red Hat Linux advisory covers CVE-2026-64463 affecting Red Hat Enterprise Linux 8, Red Hat package: kernel-rt.
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Summary
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.
A flaw was found in the Linux kernel's USB Type-C subsystem, specifically within the `tcpci_rt1711h` driver. When a USB Type-C port is initialized, the system may fail to properly unregister the port if certain setup steps do not complete successfully.
This oversight in resource management could lead to system instability or a denial of service (DoS), where legitimate users are unable to access system resources. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-459. Affected Red Hat products: Red Hat Enterprise Linux 8.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 10 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 10 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 10 days ago·verify at source
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