CVE-2026-72171: mtd: slram: remove failed entries from the device list

CVE-2026-72171: mtd: slram: remove failed entries from the device list

[Greg Kroah-Hartman]

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

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

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

mtd: slram: remove failed entries from the device list

register_device() links a new slram_mtdlist entry before allocating all
of the state needed by the entry. If a later allocation, memremap(), or
mtd_device_register() fails, the partially initialized entry remains on
the global list. A later cleanup can then dereference or free invalid
state from that failed entry.

Unwind the partially initialized entry and clear the list tail on each
failure path after the entry has been linked.

The Linux kernel CVE team has assigned CVE-2026-72171 to this issue.


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

	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.10.261 with commit 9ee674ab10f755bbedbcbb8e76745d2bb8de88d1
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.15.212 with commit e97415b8254d9cc131b7bb1c80fcf38123269b9a
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.1.178 with commit f40acf577bb0fb0829f285ecfeb27d817840601c
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.145 with commit 200b8bc5b6065b02f3775cf131f14b8e1156a00a
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.97 with commit 2fd0cbbb34447ccddab67a2a638a07c6d94cae7a
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.18.40 with commit d8dcbbfa0d695a5244059aa34a2e81f3e8df1082
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.1.5 with commit bdcdfc2464659789032edfad15ff5f7a166f5d7b
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.2-rc1 with commit 36f1648644d769c496a8e47e53603e863e358d73

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-2026-72171
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/mtd/devices/slram.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/9ee674ab10f755bbedbcbb8e76745d2bb8de88d1
	https://git.kernel.org/stable/c/e97415b8254d9cc131b7bb1c80fcf38123269b9a
	https://git.kernel.org/stable/c/f40acf577bb0fb0829f285ecfeb27d817840601c
	https://git.kernel.org/stable/c/200b8bc5b6065b02f3775cf131f14b8e1156a00a
	https://git.kernel.org/stable/c/2fd0cbbb34447ccddab67a2a638a07c6d94cae7a
	https://git.kernel.org/stable/c/d8dcbbfa0d695a5244059aa34a2e81f3e8df1082
	https://git.kernel.org/stable/c/bdcdfc2464659789032edfad15ff5f7a166f5d7b
	https://git.kernel.org/stable/c/36f1648644d769c496a8e47e53603e863e358d73