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CVE-2026-89585 auxdisplay: charlcd: cancel backlight work on registration failure

🗓️ 11 Sep 2026 19:44:50Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 17 Views

Use-after-free in Linux kernel charlcd auxdisplay driver when backlight work outlives freed object.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-89585
11 Sep 202619:44
cve
debiancve
Debian CVE
CVE-2026-89585
11 Sep 202619:44
debiancve
euvd
EUVD
EUVD-2026-76497
11 Sep 202619:44
euvd
nvd
NVD
CVE-2026-89585
11 Sep 202620:19
nvd
osv
OSV
DEBIAN-CVE-2026-89585
11 Sep 202620:19
osv
ptsecurity
Positive Technologies
PT-2026-90301
11 Sep 202600:00
ptsecurity
redhatcve
RedhatCVE
CVE-2026-89585
11 Sep 202622:22
redhatcve
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/auxdisplay/charlcd.c"
    ],
    "versions": [
      {
        "version": "39f8ea46724efbed3ca021863a22337c31be264c",
        "lessThan": "fe7ba73dde94c5f413b1588cd444b49105015dda",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "39f8ea46724efbed3ca021863a22337c31be264c",
        "lessThan": "84858671842ae5857b9ed1202b62f9045373dcd1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "39f8ea46724efbed3ca021863a22337c31be264c",
        "lessThan": "ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "39f8ea46724efbed3ca021863a22337c31be264c",
        "lessThan": "e3e3bf40916c1e810df03958cfa7ba6883cdce79",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/auxdisplay/charlcd.c"
    ],
    "versions": [
      {
        "version": "4.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.109",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.50",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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