CVE-2026-90158
kernel: m68k: nfcon: Do not call console_is_registered() in nfcon_device()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 13, 2026
Description
A flaw was found in the Linux kernel's m68k nfcon module. A deadlock can occur when the show_cons_active() function calls the .device() method while holding the console_list_lock, and the console_is_registered() function attempts to acquire the same lock. This contention for the lock can lead to a system deadlock, effectively causing a Denial of Service (DoS) for affected systems.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-833 · Deadlock