{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-46202",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46202",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-28T09:40:18.687Z",
    "updatedAt": "2026-06-14T18:02:25.494Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "HID: appletb-kbd: run inactivity autodim from workqueues",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: appletb-kbd: run inactivity autodim from workqueues\n\nThe autodim code in hid-appletb-kbd takes backlight_device->ops_lock\nvia backlight_device_set_brightness() -> mutex_lock() from two\ndifferent atomic contexts:\n\n * appletb_inactivity_timer() is a struct timer_list callback, so it\n   runs in softirq context.  Every expiry triggers\n\n     BUG: sleeping function called from invalid context at kernel/locking/mutex.c:591\n     Call Trace:\n      <IRQ>\n      __might_resched\n      __mutex_lock\n      backlight_device_set_brightness\n      appletb_inactivity_timer\n      call_timer_fn\n      run_timer_softirq\n\n * reset_inactivity_timer() is called from appletb_kbd_hid_event() and\n   appletb_kbd_inp_event().  On real USB hardware these run in\n   softirq/IRQ context (URB completion and input-event dispatch).\n   When the Touch Bar has already been dimmed or turned off, the\n   reset path calls backlight_device_set_brightness() directly to\n   restore brightness, producing the same warning.\n\nBoth call sites hit the same mutex_lock()-from-atomic bug.  Fix them\ntogether by moving the blocking work onto the system workqueue:\n\n * Convert the inactivity timer from struct timer_list to\n   struct delayed_work; the callback (appletb_inactivity_work) now\n   runs in process context where mutex_lock() is legal.\n * Add a dedicated struct work_struct restore_brightness_work and have\n   reset_inactivity_timer() schedule it instead of calling\n   backlight_device_set_brightness() directly.\n\nCancel both works synchronously during driver tear-down alongside the\nexisting backlight reference drop.\n\nThe semantics are unchanged (same delays, same state transitions on\ndim, turn-off and user activity); only the execution context of the\nsleeping call changes.  The timer field and callback are renamed to\nmatch their new type; reset_inactivity_timer() keeps its name because\nit is invoked from input event paths that read naturally as \"reset\nthe inactivity timer\".",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "93a0fc48948107e0cc34e1de22c3cb363a8f2783",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5c0830323689ef15224f0025276176988861b3b0"
            },
            {
              "version": "93a0fc48948107e0cc34e1de22c3cb363a8f2783",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2473a334c292af257ef68e33bc7760f4a8251812"
            },
            {
              "version": "93a0fc48948107e0cc34e1de22c3cb363a8f2783",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1654e53349d4e657b331de354313461f401f5063"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.15"
            },
            {
              "version": "6.18.32",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}