CVE-2026-97531: scsi: qla2xxx: Skip vport under deletion in report ID acquisition

CVE-2026-97531: scsi: qla2xxx: Skip vport under deletion in report ID acquisition

[Greg Kroah-Hartman]

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

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

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

scsi: qla2xxx: Skip vport under deletion in report ID acquisition

qla24xx_report_id_acquisition() format-1 handling walks ha->vp_list under
vport_slock, takes a vref_count on the matching vport and calls
qla_update_host_map() to register its port id.

A vport teardown via qla24xx_vport_delete() sets VPORT_DELETE, then
qla24xx_disable_vp() removes the vport from the host_map btree and zeroes
vha->d_id (RESET_AL_PA). The vport is only unlinked from vp_list later,
in qla24xx_deallocate_vp_id(), which clears vp_map[idx] (RESET_VP_IDX)
but does not touch host_map. In the window in between, report ID
acquisition can still find the vport on vp_list and call
qla_update_host_map(); with d_id already zeroed it takes the
btree_insert32() path and re-inserts the dying vport into host_map.
Nothing cleans that entry afterwards, so once scsi_host_put() frees the
vha a later host_map lookup dereferences freed memory.

Skip a vport that has VPORT_DELETE set before taking the reference, so it
is neither re-registered nor scheduled for DPC re-registration. This
mirrors the existing guard in qla2x00_alert_all_vps().

The Linux kernel CVE team has assigned CVE-2026-97531 to this issue.


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

	Issue introduced in 4.11 with commit 41dc529a4602ac737020f423f84686a81de38e6d and fixed in 6.18.53 with commit d61e8de98c5a52978fb1edd95fe4dde3131b280e
	Issue introduced in 4.11 with commit 41dc529a4602ac737020f423f84686a81de38e6d and fixed in 7.2.7 with commit 7a83979d92782f83c90888ebe19bdc9420521940
	Issue introduced in 4.11 with commit 41dc529a4602ac737020f423f84686a81de38e6d and fixed in 7.3-rc1 with commit 23582731afa35031c94fadb71a4f3b4afd094649

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-2026-97531
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/qla2xxx/qla_mbx.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/d61e8de98c5a52978fb1edd95fe4dde3131b280e
	https://git.kernel.org/stable/c/7a83979d92782f83c90888ebe19bdc9420521940
	https://git.kernel.org/stable/c/23582731afa35031c94fadb71a4f3b4afd094649