CVE-2026-64103

/// Technical description

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

scsi: isci: Fix use-after-free in device removal path

The ISCI completion tasklet is initialized in isci_host_alloc()

(drivers/scsi/isci/init.c:496) and scheduled from both MSI-X and legacy

interrupt handlers (drivers/scsi/isci/host.c:223,613).

isci_host_deinit() stops the controller and waits for stop completion,

but it never kills completion_tasklet before teardown continues. A

top-of-function tasklet_kill() is not sufficient here: interrupts are

only disabled when isci_host_stop_complete() runs, so until

wait_for_stop() returns the IRQ handlers can still requeue the

tasklet. The tasklet callback also re-enables interrupts after draining

completions, so killing the tasklet before the source is quiesced leaves

the same race open.

Once wait_for_stop() returns, no further IRQ-driven scheduling can

occur. Kill completion_tasklet there so teardown cannot race a queued

tasklet running on a dead ihost. On remove or unlo

/// 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