CVE-2026-68221: media: nuvoton: npcm-video: fix memory leaks in probe and remove

From: Greg Kroah-Hartman <[email protected]>

Description
===========

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

media: nuvoton: npcm-video: fix memory leaks in probe and remove

npcm_video_probe() allocates the npcm_video structure with kzalloc_obj()
but never frees it on any probe error path or in npcm_video_remove(),
leaking the allocation on every failed probe and every normal unbind.

Additionally, when npcm_video_setup_video() fails, the reserved memory
association established by of_reserved_mem_device_init() in
npcm_video_init() is not released, leaking the rmem_assigned_device
entry on the global list.

Fix both by adding kfree(video) to all probe error paths and to
npcm_video_remove(), and adding the missing
of_reserved_mem_device_release() call when npcm_video_setup_video()
fails.

The Linux kernel CVE team has assigned CVE-2026-68221 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.7 with commit 46c15a4ff1f4fe078c5b250fb2570020211eab38 and fixed in 6.12.101 with commit b092d690a9b28795ab2db083023e8a5368cddb22
	Issue introduced in 6.7 with commit 46c15a4ff1f4fe078c5b250fb2570020211eab38 and fixed in 6.18.42 with commit 181a0aeefd56f9285325b84789aa348aba0508bf
	Issue introduced in 6.7 with commit 46c15a4ff1f4fe078c5b250fb2570020211eab38 and fixed in 7.1.6 with commit 65ddc021d39d6383635ee8b0970b2d1c7947e447
	Issue introduced in 6.7 with commit 46c15a4ff1f4fe078c5b250fb2570020211eab38 and fixed in 7.2-rc1 with commit 50cc0e547da50b887e63dfa1ad203cd5b735d01e

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-68221
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/media/platform/nuvoton/npcm-video.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/b092d690a9b28795ab2db083023e8a5368cddb22
	https://git.kernel.org/stable/c/181a0aeefd56f9285325b84789aa348aba0508bf
	https://git.kernel.org/stable/c/65ddc021d39d6383635ee8b0970b2d1c7947e447
	https://git.kernel.org/stable/c/50cc0e547da50b887e63dfa1ad203cd5b735d01e