Bug 2367568 (CVE-2025-37967)

Summary: CVE-2025-37967 kernel: usb: typec: ucsi: displayport: Fix deadlock
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: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-20 17:01:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

usb: typec: ucsi: displayport: Fix deadlock

This patch introduces the ucsi_con_mutex_lock / ucsi_con_mutex_unlock
functions to the UCSI driver. ucsi_con_mutex_lock ensures the connector
mutex is only locked if a connection is established and the partner pointer
is valid. This resolves a deadlock scenario where
ucsi_displayport_remove_partner holds con->mutex waiting for
dp_altmode_work to complete while dp_altmode_work attempts to acquire it.
Comment 1 Avinash Hanwate 2025-05-21 07:06:11 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025052045-CVE-2025-37967-9dfe@gregkh/T
Comment 2 Avinash Hanwate 2025-05-21 07:46:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025052045-CVE-2025-37967-9dfe@gregkh/T