CVE-2025-38404 usb: typec: displayport: Fix potential deadlock

What is CVE-2025-38404?

CVE-2025-38404 is a medium-severity vulnerability in Debian Debian Linux, published on 25 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-667

Which versions are affected by CVE-2025-38404?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2025-38404?

Apply the vendor's patch.

Is CVE-2025-38404 being exploited?

There is no known exploitation of CVE-2025-38404 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-65678, BELL-CVE-2025-38404, DEBIAN-CVE-2025-38404, GHSA-whrv-p2hp-qr7f, ROOT-OS-DEBIAN-11-CVE-2025-38404, ROOT-OS-DEBIAN-12-CVE-2025-38404 and 1 more.