CVE-2026-74706

Summary

In the Linux kernel, the following vulnerability has been resolved:

bnge: Fix NULL pointer dereference in aux device release

If allocation of auxr_dev fails during auxiliary device setup, the error path calls auxiliary_device_uninit(), which eventually invokes bnge_aux_dev_release().

The release callback unconditionally dereferences aux_priv->auxr_dev->pdev to retrieve the parent bnge_dev. Since auxr_dev has not yet been allocated on this failure path, the dereference results in a NULL pointer exception

Retrieve the parent bnge_dev from the auxiliary device's parent instead of auxr_dev, and free auxr_dev only when it was successfully allocated. This allows the release callback to correctly clean up partially initialized auxiliary devices.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/83ef2f3cab7fe6dd9155cd598dc64be524d963a9
• https://git.kernel.org/stable/c/1cb4298810e27e037d3ca07286ecbb97e89ba58d

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