CVE-2026-80874: arm64: dts: renesas: ironhide: Describe inline ECC carveouts

CVE-2026-80874: arm64: dts: renesas: ironhide: Describe inline ECC carveouts

[Greg Kroah-Hartman]

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

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

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

arm64: dts: renesas: ironhide: Describe inline ECC carveouts

The DBSC5 DRAM controller protects DRAM content using inline ECC.
The inline ECC utilizes areas of DRAM for its operation, which are
in the DRAM address range, but must not be accessed or modified.
Describe the inline ECC carveout areas used by the DBSC5 controller
on this hardware as reserved-memory, which must not be accessed.
Include DRAM areas which are unprotected by ECC as well, those are
parts of the DRAM which directly precede the ECC carveout.

In case of high DRAM utilization, unless the inline ECC carveouts
are properly reserved, Linux may use and corrupt the memory used
by the DBSC5 DRAM controller for inline ECC, which would lead to
the system becoming unstable.

The Linux kernel CVE team has assigned CVE-2026-80874 to this issue.


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

	Issue introduced in 6.19 with commit ad142a4ef7106326bbf5c67eb39f21ef77fe8be3 and fixed in 7.1.5 with commit 7cc51bb053f6b4bb17db4e10afcef3147566cb47
	Issue introduced in 6.19 with commit ad142a4ef7106326bbf5c67eb39f21ef77fe8be3 and fixed in 7.2 with commit 6fa6ee724d8dadf392139e242ac936b5da730c4b

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-2026-80874
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:
	arch/arm64/boot/dts/renesas/r8a78000-ironhide.dts


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/7cc51bb053f6b4bb17db4e10afcef3147566cb47
	https://git.kernel.org/stable/c/6fa6ee724d8dadf392139e242ac936b5da730c4b