SB20260812147 - Use-after-free in Linux kernel usb core driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-68372)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to a use-after-free in the USB Type-C connector handling in drivers/usb/core/port.c when processing Thunderbolt dock unplug and concurrent partner-disconnect events. A local user can trigger a crafted hot-unplug race to cause a denial of service.

Exploitation requires a race between component unbind, USB disconnect, and UCSI partner-disconnect handling during dock hot-plug events.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7714fb896ed308cf13d32d317040adc4f200b8e4
• https://git.kernel.org/stable/c/78d361e60caf1999d51bda0e1b1004f5d39fcfbc
• https://git.kernel.org/stable/c/e00109b5adf71635919248e9ab6300a662e6a3e8
• https://git.kernel.org/stable/c/e0b291fe117964037e0ba382eff4bb365d531c3a