linux-cve-announce - CVE-2025-38092: ksmbd: use list_first_entry_or_null for opinfo_get

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Message-ID: <2025070237-CVE-2025-38092-70a8@gregkh>
Date: Wed,  2 Jul 2025 16:43:35 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38092: ksmbd: use list_first_entry_or_null for opinfo_get_list()

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

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

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

ksmbd: use list_first_entry_or_null for opinfo_get_list()

The list_first_entry() macro never returns NULL.  If the list is
empty then it returns an invalid pointer.  Use list_first_entry_or_null()
to check if the list is empty.

The Linux kernel CVE team has assigned CVE-2025-38092 to this issue.


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

	Fixed in 6.6.93 with commit c78abb646ff823e7d22faad4cc0703d4484da9e8
	Fixed in 6.12.32 with commit 334da674b25fdb7a1a4d4b89dcd7795144fc7e11
	Fixed in 6.14.10 with commit cb7e06e9736d73007dc8dab7b353733bb37df86b
	Fixed in 6.15 with commit 10379171f346e6f61d30d9949500a8de4336444a

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-2025-38092
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:
	fs/smb/server/oplock.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/c78abb646ff823e7d22faad4cc0703d4484da9e8
	https://git.kernel.org/stable/c/334da674b25fdb7a1a4d4b89dcd7795144fc7e11
	https://git.kernel.org/stable/c/cb7e06e9736d73007dc8dab7b353733bb37df86b
	https://git.kernel.org/stable/c/10379171f346e6f61d30d9949500a8de4336444a