CVE-2026-89842

/// Technical description

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

scsi: qla2xxx: Skip NVMe LS reject IOCB when FW not started

qla_nvme_xmt_ls_rsp() bails out to the out: label when firmware is not

started (!ha->flags.fw_started), but the out: path unconditionally calls

qla_nvme_ls_reject_iocb(), which ends in qla2x00_start_iocbs() and an

unconditional doorbell write to the request queue in-pointer register.

This rings the firmware doorbell and queues an IOCB that stopped or

resetting firmware cannot consume, and touches MMIO during the reset/EEH

window where fw_started is also clear.

Only emit the LS reject IOCB (and ring the doorbell) when fw_started is

set; otherwise just clean up and return. The post-allocation failure

cases (SRB alloc / qla2x00_start_sp() failure) run with firmware started

and still send the reject. Apply the same guard to the reject emission

in qla2xxx_process_purls_pkt().

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References