What’s Vulnerable › Vulnerabilities

CVE-2026-90158: m68k: nfcon: Do not call console_is_registered() in nfcon_device()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.2 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5
• https://git.kernel.org/stable/c/7d3f15a664d115584fc177b5f2cfbdb3e5a50d60
• https://git.kernel.org/stable/c/be98f92fc244688a6bdecbc834cf2cd243056d9d
• https://git.kernel.org/stable/c/d73441232f1f067eb659e94447b1353c16609711
• https://git.kernel.org/stable/c/e5e11274b5512e24a346ed83f8dd85e3389d2f4b

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