CVE-2026-74706bnge: Fix NULL pointer dereference in aux device release

Official description

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 packages & fixed versions

Affected products (as reported)

References

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