CVE-2026-93046: software node: Fix software_node_get_reference_args() with index -1

CVE-2026-93046: software node: Fix software_node_get_reference_args() with index -1

[Greg Kroah-Hartman]

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

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

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

software node: Fix software_node_get_reference_args() with index -1

The bounds check for the index passed to
software_node_get_reference_args() was failing when passed UINT_MAX,
this in turn would lead to an out of bound access in the property
array. Fix the bound check to also cover the UINT_MAX case.

The Linux kernel CVE team has assigned CVE-2026-93046 to this issue.


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

	Issue introduced in 5.10.239 with commit 142acd739eb6f08c148a96ae8309256f1422ff4b and fixed in 5.10.270 with commit 6cde06887487b4febd14658c9a246616abcc0097
	Issue introduced in 5.15.186 with commit 56ce76e8d406cc72b89aee7931df5cf3f18db49d and fixed in 5.15.221 with commit 0631384eadebc66d92d2dd72d57a0263c3877bee
	Issue introduced in 6.1.142 with commit 9324127b07dde8529222dc19233aa57ec810856c and fixed in 6.1.188 with commit b2fa4e8c7e4a33e02e6aaa8f6df72f84cf4aed75
	Issue introduced in 6.6.95 with commit f9397cf7bfb680799fb8c7f717c8f756384c3280 and fixed in 6.6.157 with commit 4ebf96d5f834aba7f6d0397db4c421f6078171b9
	Issue introduced in 6.12.35 with commit 4b3383110b6df48e0ba5936af2cb68d5eb6bd43b and fixed in 6.12.110 with commit 849076df15129e47dd8db751fa18489419ffea56
	Issue introduced in 6.16 with commit 31e4e12e0e9609850cefd4b2e1adf782f56337d6 and fixed in 6.18.52 with commit df5466412b362db7adfa78e3e092fe07ac6769a4
	Issue introduced in 6.16 with commit 31e4e12e0e9609850cefd4b2e1adf782f56337d6 and fixed in 7.2.6 with commit 231bbc04c58f115a505bf3b668ec69ef40a1773b
	Issue introduced in 6.16 with commit 31e4e12e0e9609850cefd4b2e1adf782f56337d6 and fixed in 7.3-rc1 with commit ba3dedcf3bd47017307595a7e54924198f018246
	Issue introduced in 6.15.4 with commit 7af18e42bdefe1dba5bcb32555a4d524fd504939

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-2026-93046
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/base/swnode.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/6cde06887487b4febd14658c9a246616abcc0097
	https://git.kernel.org/stable/c/0631384eadebc66d92d2dd72d57a0263c3877bee
	https://git.kernel.org/stable/c/b2fa4e8c7e4a33e02e6aaa8f6df72f84cf4aed75
	https://git.kernel.org/stable/c/4ebf96d5f834aba7f6d0397db4c421f6078171b9
	https://git.kernel.org/stable/c/849076df15129e47dd8db751fa18489419ffea56
	https://git.kernel.org/stable/c/df5466412b362db7adfa78e3e092fe07ac6769a4
	https://git.kernel.org/stable/c/231bbc04c58f115a505bf3b668ec69ef40a1773b
	https://git.kernel.org/stable/c/ba3dedcf3bd47017307595a7e54924198f018246