CVE-2022-50826

/// Technical description

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

ipu3-imgu: Fix NULL pointer dereference in imgu_subdev_set_selection()

Calling v4l2_subdev_get_try_crop() and v4l2_subdev_get_try_compose()

with a subdev state of NULL leads to a NULL pointer dereference. This

can currently happen in imgu_subdev_set_selection() when the state

passed in is NULL, as this method first gets pointers to both the "try"

and "active" states and only then decides which to use.

The same issue has been addressed for imgu_subdev_get_selection() with

commit 30d03a0de650 ("ipu3-imgu: Fix NULL pointer dereference in active

selection access"). However the issue still persists in

imgu_subdev_set_selection().

Therefore, apply a similar fix as done in the aforementioned commit to

imgu_subdev_set_selection(). To keep things a bit cleaner, introduce

helper functions for "crop" and "compose" access and use them in both

imgu_subdev_set_selection() and imgu_subdev_get_selection().

/// 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