CVE-2026-90158 PUBLISHED

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

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 7c2af0f634f1bc761ca827310dc7e8e586af502f to 7d3f15a664d115584fc177b5f2cfbdb3e5a50d60 (excl.)
  • affected from 7c2af0f634f1bc761ca827310dc7e8e586af502f to e5e11274b5512e24a346ed83f8dd85e3389d2f4b (excl.)
  • affected from 7c2af0f634f1bc761ca827310dc7e8e586af502f to be98f92fc244688a6bdecbc834cf2cd243056d9d (excl.)
  • affected from 7c2af0f634f1bc761ca827310dc7e8e586af502f to d73441232f1f067eb659e94447b1353c16609711 (excl.)
  • affected from 7c2af0f634f1bc761ca827310dc7e8e586af502f to 2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.2 is affected
  • unaffected from 0 to 6.2 (excl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References