CVE-2026-90158

Summary

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

m68k: nfcon: Do not call console_is_registered() in nfcon_device()

Since 7c2af0f634f1 ("tty: tty_io: use console_list_lock for list synchronization") show_cons_active() calls the .device() method under the console_list_lock, but console_is_registered() tries to acquire console_list_lock as well, causing a deadlock. It should not be necessary to check console_is_registered() here since the function should not be called in the fist place when the console is not registered.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7c2af0f634f1bc761ca827310dc7e8e586af502f < 7d3f15a664d115584fc177b5f2cfbdb3e5a50d60affected
LinuxLinux7c2af0f634f1bc761ca827310dc7e8e586af502f < e5e11274b5512e24a346ed83f8dd85e3389d2f4baffected
LinuxLinux7c2af0f634f1bc761ca827310dc7e8e586af502f < be98f92fc244688a6bdecbc834cf2cd243056d9daffected
LinuxLinux7c2af0f634f1bc761ca827310dc7e8e586af502f < d73441232f1f067eb659e94447b1353c16609711affected
LinuxLinux7c2af0f634f1bc761ca827310dc7e8e586af502f < 2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References