CVE-2026-80649: firmware: arm_scmi: Fix OOB in scmi_power_name_get()

CVE-2026-80649: firmware: arm_scmi: Fix OOB in scmi_power_name_get()

[Greg Kroah-Hartman]

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

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

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

firmware: arm_scmi: Fix OOB in scmi_power_name_get()

scmi_power_name_get() does not validate the domain number passed by the
external caller, which may lead to an out-of-bounds access.

Fix this by returning "unknown" for invalid domains, like
scmi_reset_name_get() does.

The Linux kernel CVE team has assigned CVE-2026-80649 to this issue.


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

	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 5.15.212 with commit 01613f5e4ff6c080260615392338e92e261d109b
	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 6.1.178 with commit ca94597440fa546e56293abe9d0af6c73535d44e
	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 6.6.145 with commit 30aa348494531adfb043b2e883afc0439e5fcdca
	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 6.12.97 with commit 0db2bb3c948ef8b7364768554d6ab5e1544dc441
	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 6.18.40 with commit 11daac2817dca75e3eabb2050bc620c29e686fcd
	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 7.1.5 with commit 11bb771f3c55b4cef3879e69da4ddecd6085569c
	Issue introduced in 4.17 with commit 76a6550990e296a7acbb4d33201c9740be912a8c and fixed in 7.2 with commit f9ef3f66f4b18078e464b7606f9497e4dbeb9905

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-2026-80649
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/firmware/arm_scmi/power.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/01613f5e4ff6c080260615392338e92e261d109b
	https://git.kernel.org/stable/c/ca94597440fa546e56293abe9d0af6c73535d44e
	https://git.kernel.org/stable/c/30aa348494531adfb043b2e883afc0439e5fcdca
	https://git.kernel.org/stable/c/0db2bb3c948ef8b7364768554d6ab5e1544dc441
	https://git.kernel.org/stable/c/11daac2817dca75e3eabb2050bc620c29e686fcd
	https://git.kernel.org/stable/c/11bb771f3c55b4cef3879e69da4ddecd6085569c
	https://git.kernel.org/stable/c/f9ef3f66f4b18078e464b7606f9497e4dbeb9905