CVE-2026-98666: iio: gyro: adis16136: fix unprotected debugfs reads

CVE-2026-98666: iio: gyro: adis16136: fix unprotected debugfs reads

[Greg Kroah-Hartman]

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

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

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

iio: gyro: adis16136: fix unprotected debugfs reads

The serial_number file operations are open coded and never call
debugfs_file_get(), which debugfs_create_file_unsafe() requires.
debugfs_remove_recursive() therefore does not wait for a read in
progress, and unbind frees the iio_dev underneath it.

Use debugfs_create_file() instead.

The Linux kernel CVE team has assigned CVE-2026-98666 to this issue.


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

	Issue introduced in 4.16 with commit 9aaea09b4cbdbe1a80ab3fa1a5d32c3ec61fa6e2 and fixed in 6.12.113 with commit d5b0b62e26d7d30e0e16e2d695f2161f7e92a5a5
	Issue introduced in 4.16 with commit 9aaea09b4cbdbe1a80ab3fa1a5d32c3ec61fa6e2 and fixed in 6.18.56 with commit b53dc6e15aead039bc6a5e08060c96786240c81d
	Issue introduced in 4.16 with commit 9aaea09b4cbdbe1a80ab3fa1a5d32c3ec61fa6e2 and fixed in 7.2.10 with commit b05e768420352d9051f86c1a1f20f44fa046ba45
	Issue introduced in 4.16 with commit 9aaea09b4cbdbe1a80ab3fa1a5d32c3ec61fa6e2 and fixed in 7.3-rc6 with commit 2b498df75d6c29aa3e760127ae0f0003df598b53

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-2026-98666
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/iio/gyro/adis16136.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/d5b0b62e26d7d30e0e16e2d695f2161f7e92a5a5
	https://git.kernel.org/stable/c/b53dc6e15aead039bc6a5e08060c96786240c81d
	https://git.kernel.org/stable/c/b05e768420352d9051f86c1a1f20f44fa046ba45
	https://git.kernel.org/stable/c/2b498df75d6c29aa3e760127ae0f0003df598b53