# CVE-2026-89585

## Summary

- **CVE ID:** CVE-2026-89585
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- Linux — Linux (39f8ea46724efbed3ca021863a22337c31be264c)
- Linux — Linux (4.12)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/fe7ba73dde94c5f413b1588cd444b49105015dda)
- [CNA](https://git.kernel.org/stable/c/84858671842ae5857b9ed1202b62f9045373dcd1)
- [CNA](https://git.kernel.org/stable/c/ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755)
- [CNA](https://git.kernel.org/stable/c/e3e3bf40916c1e810df03958cfa7ba6883cdce79)
- [CNA](https://git.kernel.org/stable/c/cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04)
- [CNA](https://git.kernel.org/stable/c/22586432c1aba89d9bd33f3173408dac830f220b)
- [CNA](https://git.kernel.org/stable/c/6eaed64a32e550daf0dc9549742b3ab9e41d984f)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 6.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._