CVE-2026-23306

/// Technical description

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

scsi: pm8001: Fix use-after-free in pm8001_queue_command()

Commit e29c47fe8946 ("scsi: pm8001: Simplify pm8001_task_exec()") refactors

pm8001_queue_command(), however it introduces a potential cause of a double

free scenario when it changes the function to return -ENODEV in case of phy

down/device gone state.

In this path, pm8001_queue_command() updates task status and calls

task_done to indicate to upper layer that the task has been handled.

However, this also frees the underlying SAS task. A -ENODEV is then

returned to the caller. When libsas sas_ata_qc_issue() receives this error

value, it assumes the task wasn't handled/queued by LLDD and proceeds to

clean up and free the task again, resulting in a double free.

Since pm8001_queue_command() handles the SAS task in this case, it should

return 0 to the caller indicating that the task has been handled.

/// 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