CVE-2026-97536
HighCVSS 7.5Summary
In the Linux kernel, the scsi qla2xxx driver could trigger a use-after-free during queue teardown: free_irq() did not cancel work already queued on ha->wq, so qla_do_work() could access a freed qpair and response queue. The fix adds cancel_work_sync() after free_irq() and before freeing memory.
Risk Assessment
May lead to use-after-free, kernel panic, or memory corruption, especially during full adapter teardown.
Recommendation
Update the Linux kernel to a version containing the fix in qla25xx_free_rsp_que().
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Original NVD description (English source)
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) and before the response queue and qpair memory are freed (so the flushed handler still sees valid memory). Guard on rsp->qpair and ha->wq to match the INIT_WORK() condition and avoid operating on an uninitialized work_struct.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS