linux-cve-announce - CVE-2026-23068: spi: spi-sprd-adi: Fix double free in probe error path

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Message-ID: <2026020417-CVE-2026-23068-0852@gregkh>
Date: Wed,  4 Feb 2026 17:14:27 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23068: spi: spi-sprd-adi: Fix double free in probe error path

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

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

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

spi: spi-sprd-adi: Fix double free in probe error path

The driver currently uses spi_alloc_host() to allocate the controller
but registers it using devm_spi_register_controller().

If devm_register_restart_handler() fails, the code jumps to the
put_ctlr label and calls spi_controller_put(). However, since the
controller was registered via a devm function, the device core will
automatically call spi_controller_put() again when the probe fails.
This results in a double-free of the spi_controller structure.

Fix this by switching to devm_spi_alloc_host() and removing the
manual spi_controller_put() call.

The Linux kernel CVE team has assigned CVE-2026-23068 to this issue.


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

	Issue introduced in 4.17 with commit ac1775012058e13ef1522938e27f5973d9e3f053 and fixed in 6.6.122 with commit 417cdfd9b9f986e95bfcb1d68eb443e6e0a15f8c
	Issue introduced in 4.17 with commit ac1775012058e13ef1522938e27f5973d9e3f053 and fixed in 6.12.68 with commit 346775f2b4cf839177e8e86b94aa180a06dc15b0
	Issue introduced in 4.17 with commit ac1775012058e13ef1522938e27f5973d9e3f053 and fixed in 6.18.8 with commit f6d6b3f172df118db582fe5ec43ae223a55d99cf
	Issue introduced in 4.17 with commit ac1775012058e13ef1522938e27f5973d9e3f053 and fixed in 6.19-rc7 with commit 383d4f5cffcc8df930d95b06518a9d25a6d74aac

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-2026-23068
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/spi/spi-sprd-adi.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/417cdfd9b9f986e95bfcb1d68eb443e6e0a15f8c
	https://git.kernel.org/stable/c/346775f2b4cf839177e8e86b94aa180a06dc15b0
	https://git.kernel.org/stable/c/f6d6b3f172df118db582fe5ec43ae223a55d99cf
	https://git.kernel.org/stable/c/383d4f5cffcc8df930d95b06518a9d25a6d74aac