CVE-2026-68403

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

wifi: brcmfmac: initialize SDIO data work before cleanup

brcmf_sdio_probe() stores the newly allocated bus in sdiodev->bus before

allocating the ordered workqueue. If that allocation fails, the function

jumps to fail and calls brcmf_sdio_remove().

brcmf_sdio_remove() unconditionally cancels bus->datawork. Initialize the

work item before the first failure path that can reach brcmf_sdio_remove(),

so the cleanup path always observes a valid work object.

This issue was found by our static analysis tool and then confirmed by

manual review of the probe error path and the remove-time work drain. The

problem pattern is an early setup failure that reaches a cleanup helper

which cancels an embedded work item before its initializer has run.

A QEMU PoC forced alloc_ordered_workqueue() to fail at the same point in

brcmf_sdio_probe(), before INIT_WORK(&bus->datawork) is reached. The

resulting fail path calls brcmf_sdio_remove(), and DEBUG_OBJECTS reports

the invalid work drain with brcmf_sdio_probe() and brcmf_sdio_remove() in

the stack.