CVE-2026-80677

Description

In the Linux kernel, the following vulnerability has been resolved: driver core: use READ_ONCE() for dev->driver in dev_has_sync_state() dev_has_sync_state() reads dev->driver twice without holding device_lock() -- once for the NULL check and once to dereference ->sync_state. Some callers only hold device_links_write_lock, which doesn't prevent a concurrent unbind from clearing dev->driver via device_unbind_cleanup(). Fix it by reading dev->driver exactly once with READ_ONCE(), pairing with the WRITE_ONCE() in device_set_driver().

References

• https://git.kernel.org/stable/c/358697929351f619143f59c6a8a15a4994748b79
• https://git.kernel.org/stable/c/51b3e1de53ee5b7775c7ff90e67fdb2665fce938
• https://git.kernel.org/stable/c/5e79e0180515b31b2e2244dc3d256fd8b5a07021
• https://git.kernel.org/stable/c/860885fcd2611bca8c28dac8b2c1c7ff160f763e
• https://git.kernel.org/stable/c/89789e4c141904506163dcb91c7289a074573931