SB20260727101 - Improper resource shutdown or release in Linux kernel typec tcpm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-64463)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource shutdown or release in the rt1711h_probe() TCPCI port registration handling in drivers/usb/typec/tcpm/tcpci_rt1711h.c when handling device probe failures after registering a TCPCI port. A local user can trigger a device probe failure after port registration to cause a denial of service.

The issue occurs because the TCPCI port is not unregistered when later probe steps fail.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/569f18a83eed0b0be4615f0c7bed40fb5c50e2e6
• https://git.kernel.org/stable/c/94b1abf1af94aa5a355e9f03675e07bccfc41c4b
• https://git.kernel.org/stable/c/ce2e36e8759dfbfe546723810c306f42f484866d
• https://git.kernel.org/stable/c/e5406c8fb71cd2f89a46300a746f6e7972e621e8
• https://git.kernel.org/stable/c/e8da46d99d3710106e7c44db14566bf9b57386b5