CVE-2025-40071 tty: n_gsm: Don't block input queue by waiting MSC

In the Linux kernel, the following vulnerability has been resolved: tty: ngsm: Don't block input queue by waiting MSC Currently gsmqueue processes incoming frames and when opening a DLC channel it calls gsmdlciopen which calls gsmmodemupdate. If basic mode is used it calls gsmmodemupdviamsc and i...

CVE-2025-40071

CVE-2025-40071 pertains to the Linux kernel tty n_gsm handling. The issue arises when opening a DLC channel: gsm_queue() processes frames and invokes gsm_dlci_open() → gsm_modem_update(). In basic encoding, gsm_modem_upd_via_msc() could block the input queue waiting for a Modem Status Command (MS...