CVE-2026-89585
auxdisplay: charlcd: cancel backlight work on registration failure
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
39f8ea46724efbed3ca021863a22337c31be264c < cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04 39f8ea46724efbed3ca021863a22337c31be264c < 22586432c1aba89d9bd33f3173408dac830f220b 39f8ea46724efbed3ca021863a22337c31be264c < 6eaed64a32e550daf0dc9549742b3ab9e41d984f 39f8ea46724efbed3ca021863a22337c31be264c < fe7ba73dde94c5f413b1588cd444b49105015dda 39f8ea46724efbed3ca021863a22337c31be264c < 84858671842ae5857b9ed1202b62f9045373dcd1 39f8ea46724efbed3ca021863a22337c31be264c < ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755 39f8ea46724efbed3ca021863a22337c31be264c < e3e3bf40916c1e810df03958cfa7ba6883cdce79
Linux / Linux
4.12
References
git.kernel.org: https://git.kernel.org/stable/c/cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04 git.kernel.org: 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/fe7ba73dde94c5f413b1588cd444b49105015dda git.kernel.org: https://git.kernel.org/stable/c/84858671842ae5857b9ed1202b62f9045373dcd1 git.kernel.org: https://git.kernel.org/stable/c/ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755 git.kernel.org: https://git.kernel.org/stable/c/e3e3bf40916c1e810df03958cfa7ba6883cdce79