linux-cve-announce - CVE-2025-38485: iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025072815-CVE-2025-38485-3cec@gregkh>
Date: Mon, 28 Jul 2025 13:22:27 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38485: iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush

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

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

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

iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush

fxls8962af_fifo_flush() uses indio_dev->active_scan_mask (with
iio_for_each_active_channel()) without making sure the indio_dev
stays in buffer mode.
There is a race if indio_dev exits buffer mode in the middle of the
interrupt that flushes the fifo. Fix this by calling
synchronize_irq() to ensure that no interrupt is currently running when
disabling buffer mode.

Unable to handle kernel NULL pointer dereference at virtual address 00000000 when read
[...]
_find_first_bit_le from fxls8962af_fifo_flush+0x17c/0x290
fxls8962af_fifo_flush from fxls8962af_interrupt+0x80/0x178
fxls8962af_interrupt from irq_thread_fn+0x1c/0x7c
irq_thread_fn from irq_thread+0x110/0x1f4
irq_thread from kthread+0xe0/0xfc
kthread from ret_from_fork+0x14/0x2c

The Linux kernel CVE team has assigned CVE-2025-38485 to this issue.


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

	Issue introduced in 5.14 with commit 79e3a5bdd9efbdf4e1069793d7735b432d641e7c and fixed in 6.1.147 with commit 6ecd61c201b27ad2760b3975437ad2b97d725b98
	Issue introduced in 5.14 with commit 79e3a5bdd9efbdf4e1069793d7735b432d641e7c and fixed in 6.6.100 with commit dda42f23a8f5439eaac9521ce0531547d880cc54
	Issue introduced in 5.14 with commit 79e3a5bdd9efbdf4e1069793d7735b432d641e7c and fixed in 6.12.40 with commit bfcda3e1015791b3a63fb4d3aad408da9cf76e8f
	Issue introduced in 5.14 with commit 79e3a5bdd9efbdf4e1069793d7735b432d641e7c and fixed in 6.15.8 with commit 1803d372460aaa9ae0188a30c9421d3f157f2f04
	Issue introduced in 5.14 with commit 79e3a5bdd9efbdf4e1069793d7735b432d641e7c and fixed in 6.16 with commit 1fe16dc1a2f5057772e5391ec042ed7442966c9a

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-2025-38485
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/accel/fxls8962af-core.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/6ecd61c201b27ad2760b3975437ad2b97d725b98
	https://git.kernel.org/stable/c/dda42f23a8f5439eaac9521ce0531547d880cc54
	https://git.kernel.org/stable/c/bfcda3e1015791b3a63fb4d3aad408da9cf76e8f
	https://git.kernel.org/stable/c/1803d372460aaa9ae0188a30c9421d3f157f2f04
	https://git.kernel.org/stable/c/1fe16dc1a2f5057772e5391ec042ed7442966c9a