What’s Vulnerable › Vulnerabilities

CVE-2025-37967: usb: typec: ucsi: displayport: Fix deadlock

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-20 · updated 2026-06-17
• Weakness: CWE-667

Description

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.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 5.2 before 5.15.184; from 5.16 before 6.1.140; from 6.2 before 6.6.92; from 6.7 before 6.12.30; from 6.13 before 6.14.7; 6.15-rc1, 6.15-rc2, 6.15-rc3, 6.15-rc4, 6.15-rc5 — fixed in 5.15.184, 6.1.140, 6.12.30, 6.14.7, 6.6.92

How to fix

Upgrade to a fixed version: Linux kernel 5.15.184, 6.1.140, 6.12.30, 6.14.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/364618c89d4c57c85e5fc51a2446cd939bf57802
• https://git.kernel.org/stable/c/5924b324468845fc795bd76f588f51d7ab4f202d
• https://git.kernel.org/stable/c/61fc1a8e1e10cc784cab5829930838aaf1d37af5
• https://git.kernel.org/stable/c/962ce9028ca6eb450d5c205238a3ee27de9d214d
• https://git.kernel.org/stable/c/f32451ca4cb7dc53f2a0e2e66b84d34162747eb7
• https://git.kernel.org/stable/c/f4bd982563c2fd41ec9ca6c517c392d759db801c
• https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

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