linux-cve-announce - CVE-2023-53504: RDMA/bnxt_re: Properly order ib_device

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Message-ID: <2025100128-CVE-2023-53504-ccc8@gregkh>
Date: Wed,  1 Oct 2025 13:45:56 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53504: RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF

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

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

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

RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF

ib_dealloc_device() should be called only after device cleanup.  Fix the
dealloc sequence.

The Linux kernel CVE team has assigned CVE-2023-53504 to this issue.


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

	Issue introduced in 6.3 with commit 6d758147c7b80a46465f72e9e6294d244ee98a21 and fixed in 6.4.11 with commit c95863f6d970ef968e7c1f3c481f72a4b0734654
	Issue introduced in 6.3 with commit 6d758147c7b80a46465f72e9e6294d244ee98a21 and fixed in 6.5 with commit 5363fc488da579923edf6a2fdca3d3b651dd800b

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-2023-53504
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/infiniband/hw/bnxt_re/main.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/c95863f6d970ef968e7c1f3c481f72a4b0734654
	https://git.kernel.org/stable/c/5363fc488da579923edf6a2fdca3d3b651dd800b