usb: typec: displayport: Fix potential deadlock

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: typec: displayport: Fix potential deadlock The deadlock can occur due to a recursive lock acquisition of `cros_typec_altmode_data::mutex`. The call chain is as follows: 1. cros_typec_altmode_work() acquires the mutex 2. typec_altmode_vdm() -> dp_altmode_vdm() -> 3. typec_altmode_exit() -> cros_typec_altmode_exit() 4. cros_typec_altmode_exit() attempts to acquire the mutex again To prevent this, defer the `typec_altmode_exit()` call by scheduling it rather than calling it directly from within the mutex-protected context.

Timeline

1. Jul 25, 2025, 1:09 PM UTCCVE published
2. May 11, 2026, 9:27 PM UTCRecord last updated

Affected versions

• Linux Linux

  Version range not reported

• Linux Linux

  From 6.1.143 · fixed in 6.1.144; From 6.6.96 · fixed in 6.6.97; From 6.12.36 · fixed in 6.12.37; From 6.15.5 · fixed in 6.15.6

References 8