linux-cve-announce - CVE-2026-23090: slimbus: core: fix device reference leak on report present

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Message-ID: <2026020425-CVE-2026-23090-2971@gregkh>
Date: Wed,  4 Feb 2026 17:14:49 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23090: slimbus: core: fix device reference leak on report present

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

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

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

slimbus: core: fix device reference leak on report present

Slimbus devices can be allocated dynamically upon reception of
report-present messages.

Make sure to drop the reference taken when looking up already registered
devices.

Note that this requires taking an extra reference in case the device has
not yet been registered and has to be allocated.

The Linux kernel CVE team has assigned CVE-2026-23090 to this issue.


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

	Issue introduced in 4.16 with commit 46a2bb5a7f7ea2728be50f8f5b29a20267f700fe and fixed in 6.6.122 with commit 2ddc09f6a0a221b1d91a7cbc8cc2cefdbd334fe6
	Issue introduced in 4.16 with commit 46a2bb5a7f7ea2728be50f8f5b29a20267f700fe and fixed in 6.12.68 with commit 54de72a7aabc0749938d7a2833a0c1a5d3ed7ac9
	Issue introduced in 4.16 with commit 46a2bb5a7f7ea2728be50f8f5b29a20267f700fe and fixed in 6.18.8 with commit 6602bb4d1338e92b5838e50322b87697bdbd2ee0
	Issue introduced in 4.16 with commit 46a2bb5a7f7ea2728be50f8f5b29a20267f700fe and fixed in 6.19-rc7 with commit 9391380eb91ea5ac792aae9273535c8da5b9aa01

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-2026-23090
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/slimbus/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/2ddc09f6a0a221b1d91a7cbc8cc2cefdbd334fe6
	https://git.kernel.org/stable/c/54de72a7aabc0749938d7a2833a0c1a5d3ed7ac9
	https://git.kernel.org/stable/c/6602bb4d1338e92b5838e50322b87697bdbd2ee0
	https://git.kernel.org/stable/c/9391380eb91ea5ac792aae9273535c8da5b9aa01