CVEvulnerability
CVE-2026-89585
7.8 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-09-11
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
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.
References
- https://git.kernel.org/stable/c/22586432c1aba89d9bd33f3173408dac830f220b git.kernel.org
- https://git.kernel.org/stable/c/6eaed64a32e550daf0dc9549742b3ab9e41d984f git.kernel.org
- https://git.kernel.org/stable/c/84858671842ae5857b9ed1202b62f9045373dcd1 git.kernel.org
- https://git.kernel.org/stable/c/cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04 git.kernel.org
- https://git.kernel.org/stable/c/e3e3bf40916c1e810df03958cfa7ba6883cdce79 git.kernel.org
- https://git.kernel.org/stable/c/fe7ba73dde94c5f413b1588cd444b49105015dda git.kernel.org
- https://git.kernel.org/stable/c/ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755 git.kernel.org