CVE-2025-40001

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

scsi: mvsas: Fix use-after-free bugs in mvs_work_queue

During the detaching of Marvell's SAS/SATA controller, the original code

calls cancel_delayed_work() in mvs_free() to cancel the delayed work

item mwq->work_q. However, if mwq->work_q is already running, the

cancel_delayed_work() may fail to cancel it. This can lead to

use-after-free scenarios where mvs_free() frees the mvs_info while

mvs_work_queue() is still executing and attempts to access the

already-freed mvs_info.

A typical race condition is illustrated below:

CPU 0 (remove) | CPU 1 (delayed work callback)

mvs_pci_remove() |

mvs_free() | mvs_work_queue()

cancel_delayed_work() |

kfree(mvi) |

| mvi-> // UAF

Replace cancel_delayed_work() with cancel_delayed_work_sync() to ensure

that the delayed work item is properly canceled and any executing

delayed work item completes before the mvs_info is deallocated.

This bug was found by static analysis.