linux-cve-announce - CVE-2025-21901: RDMA/bnxt_re: Add sanity checks on rdev validity

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Message-ID: <2025040133-CVE-2025-21901-8898@gregkh>
Date: Tue,  1 Apr 2025 16:25:37 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21901: RDMA/bnxt_re: Add sanity checks on rdev validity

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

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

RDMA/bnxt_re: Add sanity checks on rdev validity

There is a possibility that ulp_irq_stop and ulp_irq_start
callbacks will be called when the device is in detached state.
This can cause a crash due to NULL pointer dereference as
the rdev is already freed.

The Linux kernel CVE team has assigned CVE-2025-21901 to this issue.


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

	Issue introduced in 6.12 with commit cc5b9b48d44756a87170f3901c6c2fd99e6b89b2 and fixed in 6.12.18 with commit aed1bc673907e3df372b317c10ff2f3582f8bf1a
	Issue introduced in 6.12 with commit cc5b9b48d44756a87170f3901c6c2fd99e6b89b2 and fixed in 6.13.6 with commit 8cb0eef46d70a99c88c26a1addb7fd955242e0e6
	Issue introduced in 6.12 with commit cc5b9b48d44756a87170f3901c6c2fd99e6b89b2 and fixed in 6.14 with commit f0df225d12fcb049429fb5bf5122afe143c2dd15

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-2025-21901
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/aed1bc673907e3df372b317c10ff2f3582f8bf1a
	https://git.kernel.org/stable/c/8cb0eef46d70a99c88c26a1addb7fd955242e0e6
	https://git.kernel.org/stable/c/f0df225d12fcb049429fb5bf5122afe143c2dd15