Improper locking in Linux kernel typec ucsi driver

1) Improper locking

EUVDB-ID: #VU109530

Risk: Low

CVSSv4.0: 4.3 [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/E:U/U:Clear]

CVE-ID: CVE-2025-37967

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the ucsi_set_drvdata() function in drivers/usb/typec/ucsi/ucsi.c, within the ucsi_displayport_enter(), ucsi_displayport_exit() and ucsi_displayport_vdm() functions in drivers/usb/typec/ucsi/displayport.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/364618c89d4c57c85e5fc51a2446cd939bf57802
https://git.kernel.org/stable/c/61fc1a8e1e10cc784cab5829930838aaf1d37af5

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.