High severity · published Sep 11, 2026
CVE-2026-89585
auxdisplay: charlcd: cancel backlight work on registration failure
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
39f8ea46724efbed3ca021863a22337c31be264c before cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04; 39f8ea46724efbed3ca021863a22337c31be264c before 22586432c1aba89d9bd33f3173408dac830f220b; 39f8ea46724efbed3ca021863a22337c31be264c before 6eaed64a32e550daf0dc9549742b3ab9e41d984f; 39f8ea46724efbed3ca021863a22337c31be264c before fe7ba73dde94c5f413b1588cd444b49105015dda; 39f8ea46724efbed3ca021863a22337c31be264c before 84858671842ae5857b9ed1202b62f9045373dcd1; 39f8ea46724efbed3ca021863a22337c31be264c before ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755; +2 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89585
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89585
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/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
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