CVE-2026-89585high

CVE-2026-89585: high-severity vulnerability in Linux

auxdisplay: charlcd: cancel backlight work on registration failure

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: auxdisplay: charlcd: cancel backlight work on registration failure With CONFIG_CHARLCD_BL_FLASH, charlcd_init() schedules bl_work before charlcd_register() calls misc_register(). If registration fails, the caller frees the charlcd object while delayed work still contains its address. Add charlcd_deinit() to cancel the delayed work and turn the backlight off. Use it for both registration rollback and normal unregistration.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/22586432c1aba89d9bd33f3173408dac830f220bhttps://git.kernel.org/stable/c/6eaed64a32e550daf0dc9549742b3ab9e41d984fhttps://git.kernel.org/stable/c/84858671842ae5857b9ed1202b62f9045373dcd1https://git.kernel.org/stable/c/cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04https://git.kernel.org/stable/c/e3e3bf40916c1e810df03958cfa7ba6883cdce79https://git.kernel.org/stable/c/fe7ba73dde94c5f413b1588cd444b49105015ddahttps://git.kernel.org/stable/c/ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755