CVE-2026-90158

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

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	7c2af0f634f1bc761ca827310dc7e8e586af502f to before 7d3f15a664d115584fc177b5f2cfbdb3e5a50d60Affected 7c2af0f634f1bc761ca827310dc7e8e586af502f to before e5e11274b5512e24a346ed83f8dd85e3389d2f4bAffected 7c2af0f634f1bc761ca827310dc7e8e586af502f to before be98f92fc244688a6bdecbc834cf2cd243056d9dAffected 7c2af0f634f1bc761ca827310dc7e8e586af502f to before d73441232f1f067eb659e94447b1353c16609711Affected 7c2af0f634f1bc761ca827310dc7e8e586af502f to before 2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5Affected
LinuxLinux	6.2Affected before 6.2Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

7c2af0f634f1bc761ca827310dc7e8e586af502f to before 7d3f15a664d115584fc177b5f2cfbdb3e5a50d60Affected
7c2af0f634f1bc761ca827310dc7e8e586af502f to before e5e11274b5512e24a346ed83f8dd85e3389d2f4bAffected
7c2af0f634f1bc761ca827310dc7e8e586af502f to before be98f92fc244688a6bdecbc834cf2cd243056d9dAffected
7c2af0f634f1bc761ca827310dc7e8e586af502f to before d73441232f1f067eb659e94447b1353c16609711Affected
7c2af0f634f1bc761ca827310dc7e8e586af502f to before 2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5Affected

LinuxLinux

6.2Affected
before 6.2Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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