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CVE-2026-89585

HIGHCVSS 7.8/10EPSS 0.16%

Last modified

CVE-2026-89585 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.16%

5.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 39f8ea46724efbed3ca021863a22337c31be264c, < cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04; >= 39f8ea46724efbed3ca021863a22337c31be264c, < 22586432c1aba89d9bd33f3173408dac830f220b; >= 39f8ea46724efbed3ca021863a22337c31be264c, < 6eaed64a32e550daf0dc9549742b3ab9e41d984f; >= 39f8ea46724efbed3ca021863a22337c31be264c, < fe7ba73dde94c5f413b1588cd444b49105015dda; >= 39f8ea46724efbed3ca021863a22337c31be264c, < 84858671842ae5857b9ed1202b62f9045373dcd1; >= 39f8ea46724efbed3ca021863a22337c31be264c, < ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755; >= 39f8ea46724efbed3ca021863a22337c31be264c, < e3e3bf40916c1e810df03958cfa7ba6883cdce79
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89585?
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.
How severe is CVE-2026-89585?
CVE-2026-89585 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89585?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST