CVE-2026-89522

/// Technical description

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

media: staging/ipu7: fix async notifier UAF on probe error path

isys_register_devices() registers the V4L2 async notifier via

isys_notifier_init(). If a subsequent probe step such as

isys_fw_log_init() fails, isys_probe() jumps to the out_cleanup label

which only calls isys_unregister_devices(). That helper tears down the

video devices, subdevices, V4L2 device and media device, but never

unregisters or cleans up the async notifier.

As a result the notifier stays chained in the global notifier_list while

the enclosing struct ipu7_isys is freed by devres, leading to list

corruption and a use-after-free the next time the list is walked.

The remove path already does the right thing by calling

isys_notifier_cleanup() before isys_unregister_devices(). Mirror that on

the probe error path so the notifier is unregistered and cleaned up

before the device is torn down.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References