CVE-2026-80974: mfd: sm501: Fix potential memory leaks during remove

CVE-2026-80974: mfd: sm501: Fix potential memory leaks during remove

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

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

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

mfd: sm501: Fix potential memory leaks during remove

The memory allocated for struct sm501_devdata in sm501_pci_probe() and
sm501_plat_probe() is not freed by the corresponding remove functions
sm501_pci_remove() and sm501_plat_remove(). Fix that by adding a call to
kfree().

The Linux kernel CVE team has assigned CVE-2026-80974 to this issue.


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

	Issue introduced in 2.6.21 with commit b6d6454fdb66f3829af8b92ab06825b6060fdf7e and fixed in 6.12.109 with commit fcc6c3b11d73459e0d55b27c98cc56d59fef4d82
	Issue introduced in 2.6.21 with commit b6d6454fdb66f3829af8b92ab06825b6060fdf7e and fixed in 6.18.50 with commit 94ca4f040ba489db2d4b66e9d1ee91b4f9a00534
	Issue introduced in 2.6.21 with commit b6d6454fdb66f3829af8b92ab06825b6060fdf7e and fixed in 7.2.4 with commit c8be3a076a59ec793fb2e4bdb830a709aaea9cce
	Issue introduced in 2.6.21 with commit b6d6454fdb66f3829af8b92ab06825b6060fdf7e and fixed in 7.3-rc1 with commit 83feedd9d83c0c5199f98c72df0a6196b4aefb4d

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-2026-80974
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/mfd/sm501.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/fcc6c3b11d73459e0d55b27c98cc56d59fef4d82
	https://git.kernel.org/stable/c/94ca4f040ba489db2d4b66e9d1ee91b4f9a00534
	https://git.kernel.org/stable/c/c8be3a076a59ec793fb2e4bdb830a709aaea9cce
	https://git.kernel.org/stable/c/83feedd9d83c0c5199f98c72df0a6196b4aefb4d