auxdisplay: charlcd: cancel backlight work on registration failure
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.
CVE-2026-89585
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89585
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04",
"versionType": "git"
},
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "22586432c1aba89d9bd33f3173408dac830f220b",
"versionType": "git"
},
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "6eaed64a32e550daf0dc9549742b3ab9e41d984f",
"versionType": "git"
},
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "fe7ba73dde94c5f413b1588cd444b49105015dda",
"versionType": "git"
},
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "84858671842ae5857b9ed1202b62f9045373dcd1",
"versionType": "git"
},
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755",
"versionType": "git"
},
{
"status": "affected",
"version": "39f8ea46724efbed3ca021863a22337c31be264c",
"lessThan": "e3e3bf40916c1e810df03958cfa7ba6883cdce79",
"versionType": "git"
}
],
"programFiles": [
"drivers/auxdisplay/charlcd.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/auxdisplay/charlcd.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89585
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35093 · Revision 1
- Added to Heist Feed
- Publisher date