CVE-2026-68403 is a vulnerability in Linux Kernel
Published on August 10, 2026
wifi: brcmfmac: initialize SDIO data work before cleanup
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.
Products Associated with CVE-2026-68403
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 9982464379e81ece51ced03ebecbbcd34ea367a6 and below f50a2b9e57a751e70ae9a272875d80d39eaccd6a is affected.
- Version 9982464379e81ece51ced03ebecbbcd34ea367a6 and below 6bd21ec8549a5854dd64204a66289952917a924c is affected.
- Version 9982464379e81ece51ced03ebecbbcd34ea367a6 and below 5c342437ea44bb829680ca9e4f683dd5b325b219 is affected.
- Version 9982464379e81ece51ced03ebecbbcd34ea367a6 and below c73c3fc1c7ca5a927639f0884624cb244ba791e4 is affected.
- Version 9982464379e81ece51ced03ebecbbcd34ea367a6 and below 2a665946e0407a05a3f81bd56a08553c446498e0 is affected.
- Version 4.1 is affected.
- Before 4.1 is unaffected.
- Version 6.6.148, <= 6.6.* is unaffected.
- Version 6.12.101, <= 6.12.* is unaffected.
- Version 6.18.42, <= 6.18.* is unaffected.
- Version 7.1.6, <= 7.1.* is unaffected.
- Version 7.2-rc4, <= * is unaffected.