linux-cve-announce - CVE-2025-38238: scsi: fnic: Fix crash in fnic_wq_cmpl

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Message-ID: <2025070930-CVE-2025-38238-dae2@gregkh>
Date: Wed,  9 Jul 2025 12:42:31 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38238: scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out

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

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

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

scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out

When both the RHBA and RPA FDMI requests time out, fnic reuses a frame to
send ABTS for each of them. On send completion, this causes an attempt to
free the same frame twice that leads to a crash.

Fix crash by allocating separate frames for RHBA and RPA, and modify ABTS
logic accordingly.

Tested by checking MDS for FDMI information.

Tested by using instrumented driver to:

 - Drop PLOGI response
 - Drop RHBA response
 - Drop RPA response
 - Drop RHBA and RPA response
 - Drop PLOGI response + ABTS response
 - Drop RHBA response + ABTS response
 - Drop RPA response + ABTS response
 - Drop RHBA and RPA response + ABTS response for both of them

The Linux kernel CVE team has assigned CVE-2025-38238 to this issue.


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

	Issue introduced in 6.14 with commit 09c1e6ab4ab2a107d96f119950dc330e446dc2b0 and fixed in 6.15.5 with commit 09679e9abedfbc5a2590759a1a7893c1c26e6044
	Issue introduced in 6.14 with commit 09c1e6ab4ab2a107d96f119950dc330e446dc2b0 and fixed in 6.16-rc4 with commit a35b29bdedb4d2ae3160d4d6684a6f1ecd9ca7c2

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-2025-38238
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/scsi/fnic/fdls_disc.c
	drivers/scsi/fnic/fnic.h
	drivers/scsi/fnic/fnic_fdls.h


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/09679e9abedfbc5a2590759a1a7893c1c26e6044
	https://git.kernel.org/stable/c/a35b29bdedb4d2ae3160d4d6684a6f1ecd9ca7c2