CVE-2026-97536

/// Technical description

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

scsi: qla2xxx: Fix use-after-free of qpair work on queue teardown

The response queue MSI-X handler qla2xxx_msix_rsp_q() schedules

qla_do_work() via queue_work(ha->wq, &qpair->q_work). qla_do_work()

dereferences the qpair (vha, rsp) and takes qpair->qp_lock.

During teardown, qla2xxx_delete_qpair() deletes the response queue, which

calls free_irq() in qla25xx_free_rsp_que(), and then frees the queue and

the qpair. free_irq() waits for running hardirq handlers but does not

cancel work already placed on ha->wq. A still-pending q_work then runs

qla_do_work() against the freed qpair and response queue, causing a

use-after-free. This is especially likely during full adapter teardown,

where destroy_workqueue(ha->wq) forces pending work to run after the queue

pairs have been freed.

Flush the work item with cancel_work_sync() in qla25xx_free_rsp_que()

after free_irq() has released the interrupt (so no new work can be

queued)

/// 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