CVE-2026-72500: RDMA/bnxt_re: Free SRQ toggle page after firmware teardown

CVE-2026-72500: RDMA/bnxt_re: Free SRQ toggle page after firmware teardown

[Greg Kroah-Hartman]

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

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

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

RDMA/bnxt_re: Free SRQ toggle page after firmware teardown

Free the toggle page only after firmware teardown completes so that
an NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write
the toggle values to an already-freed page. Move free_page() after
bnxt_qplib_destroy_srq().

The Linux kernel CVE team has assigned CVE-2026-72500 to this issue.


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

	Issue introduced in 6.12 with commit 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b and fixed in 6.18.40 with commit 104a7ff382a58a83cae018925e3574c784e8274c
	Issue introduced in 6.12 with commit 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b and fixed in 7.1.5 with commit 0adcd67f3d6f84835be682da0153f57f5c2f8036
	Issue introduced in 6.12 with commit 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b and fixed in 7.2-rc1 with commit 131e2918b9b0529687e67e2e58047304027f095a

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-2026-72500
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/ib_verbs.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/104a7ff382a58a83cae018925e3574c784e8274c
	https://git.kernel.org/stable/c/0adcd67f3d6f84835be682da0153f57f5c2f8036
	https://git.kernel.org/stable/c/131e2918b9b0529687e67e2e58047304027f095a