Bug 2507063 (CVE-2026-64463)

Summary: CVE-2026-64463 kernel: usb: typec: tcpci_rt1711h: unregister TCPCI port with devres
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-25 10:03:05 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-07-29 22:27:00 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072544-CVE-2026-64463-1ce0@gregkh/T