CVE-2026-93116 (GCVE-0-2026-93116)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-18 17:56
VLAI
Title
platform/x86: asus-wmi: fix resource leaks on probe failure
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/x86: asus-wmi: fix resource leaks on probe failure During driver initialization in asus_wmi_add(), various subsystems are registered sequentially. However, the error path labels are out of order relative to the registration sequence. Specifically: 1. If asus_wmi_custom_fan_curve_init() fails, the driver jumps to fail_custom_fan_curve. Because this label is placed below fail_sysfs, it bypasses the cleanup calls for the input device and sysfs groups, which were successfully registered before, leaking those resources. 2. If asus_screenpad_init() fails, the driver jumps to fail_screenpad. Because fail_screenpad is placed below fail_backlight, it bypasses the cleanup calls for backlight and rfkill, leaking those resources. Fix these resource leaks by reordering the error path labels in asus_wmi_add() to match the exact reverse order of the resource allocations.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0f0ac158d28ff78e75c334e869b1cb8e69372a1f , < 3308b8c5f5a28403611a2f5a46f06aabe4f0c661 (git)
Affected: 0f0ac158d28ff78e75c334e869b1cb8e69372a1f , < ef3daa2b84a2b8499ce9e2ce1c865dca36d39f95 (git)
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Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/asus-wmi.c"
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          "vendor": "Linux",
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      "cpeApplicability": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.17",
                  "vulnerable": true
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: asus-wmi: fix resource leaks on probe failure\n\nDuring driver initialization in asus_wmi_add(), various subsystems are\nregistered sequentially. However, the error path labels are out of order\nrelative to the registration sequence.\n\nSpecifically:\n1. If asus_wmi_custom_fan_curve_init() fails, the driver jumps to\n   fail_custom_fan_curve. Because this label is placed below fail_sysfs,\n   it bypasses the cleanup calls for the input device and sysfs groups,\n   which were successfully registered before, leaking those resources.\n2. If asus_screenpad_init() fails, the driver jumps to fail_screenpad.\n   Because fail_screenpad is placed below fail_backlight, it bypasses the\n   cleanup calls for backlight and rfkill, leaking those resources.\n\nFix these resource leaks by reordering the error path labels in\nasus_wmi_add() to match the exact reverse order of the resource\nallocations."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "lang": "en",
              "value": "AV:L - The leak is created in asus_wmi_add() called from asus_wmi_probe() during asus_wmi_register_driver()\u0027s platform_create_bundle() for asus-nb-wmi/eeepc-wmi module init; leftover rfkill objects are later driven via /dev/rfkill (rfkill_fop_write), not by a network or radio protocol message.\nAC:H - The dangling asus_rfkill exists only when asus_screenpad_init() returns an error other than -ENODEV after asus_wmi_rfkill_init() has registered devices, which requires an ACPI WMI failure from asus_wmi_get_devstate()/asus_wmi_evaluate_method() or backlight_device_register() failure that the attacker cannot induce.\nPR:L - After fail_screenpad skips asus_wmi_rfkill_exit(), the leaked rfkill stays on rfkill_list; rfkill_fop_write() has no capable() check, so a local session user who can open /dev/rfkill (typical laptop rfkill group/uaccess) can send RFKILL_OP_CHANGE and reach asus_rfkill_set() without CAP_SYS_ADMIN.\nUI:N - The attacker themselves writes RFKILL_OP_CHANGE/CHANGE_ALL to /dev/rfkill targeting the leaked asus-wlan/asus-bluetooth rfkill idx; no other user must mount media, plug a device, or confirm a prompt.\nS:U - kfree(asus) on the asus_wmi_add() fail_screenpad path and the later asus_rfkill_query()/asus_rfkill_set() dereference of priv-\u003easus occur in the host kernel; this is not a KVM/Xen guest escape or IOMMU/DMA bypass.\nC:H - fail_screenpad jumps past asus_wmi_rfkill_exit() and then kfree(asus) while rfkill-\u003edata still points at the embedded struct asus_rfkill; rfkill_set_block() calls asus_rfkill_query(), which reads priv-\u003easus and priv-\u003edev_id from that freed object, a kernel UAF read.\nI:H - The same dangling rfkill-\u003edata is passed to asus_rfkill_set()/asus_rfkill_wlan_set(), which use priv-\u003easus-\u003edriver and mutex_lock(\u0026asus-\u003ewmi_lock); the leaked backlight_device also keeps bl_get_data()==asus for update_bl_status(), so reclaiming the freed asus_wmi object is a write/control-flow primitive.\nA:H - asus_rfkill_query() and asus_rfkill_set() dereference the kfree\u0027d struct asus_wmi, and asus_rfkill_wlan_set() takes asus-\u003ewmi_lock in freed memory, which oopses; fail_custom_fan_curve also skips asus_wmi_input_exit(), leaving a registered input_dev until reboot."
            }
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-09-18T17:56:01.700Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/3308b8c5f5a28403611a2f5a46f06aabe4f0c661"
        },
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          "url": "https://git.kernel.org/stable/c/ef3daa2b84a2b8499ce9e2ce1c865dca36d39f95"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93116",
    "datePublished": "2026-09-17T16:11:23.852Z",
    "dateReserved": "2026-09-17T16:02:15.086Z",
    "dateUpdated": "2026-09-18T17:56:01.700Z",
    "state": "PUBLISHED"
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      "date": "2026-09-25",
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      "percentile": "0.03499"
    },
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      "cve": "CVE-2026-93116",
      "id": "msrc_CVE-2026-93116",
      "initial_release_date": "2026-09-19T01:20:22.000Z",
      "product_status:known_affected": "3",
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      "title": "platform/x86: asus-wmi: fix resource leaks on probe failure",
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        "descriptions": [
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: asus-wmi: fix resource leaks on probe failure\n\nDuring driver initialization in asus_wmi_add(), various subsystems are\nregistered sequentially. However, the error path labels are out of order\nrelative to the registration sequence.\n\nSpecifically:\n1. If asus_wmi_custom_fan_curve_init() fails, the driver jumps to\n   fail_custom_fan_curve. Because this label is placed below fail_sysfs,\n   it bypasses the cleanup calls for the input device and sysfs groups,\n   which were successfully registered before, leaking those resources.\n2. If asus_screenpad_init() fails, the driver jumps to fail_screenpad.\n   Because fail_screenpad is placed below fail_backlight, it bypasses the\n   cleanup calls for backlight and rfkill, leaking those resources.\n\nFix these resource leaks by reordering the error path labels in\nasus_wmi_add() to match the exact reverse order of the resource\nallocations."
          }
        ],
        "id": "CVE-2026-93116",
        "lastModified": "2026-09-18T18:18:21.310",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
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                "confidentialityImpact": "HIGH",
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              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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      "cve": "CVE-2026-93116",
      "id": "CVE-2026-93116",
      "initial_release_date": "2026-09-17T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "200",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: platform/x86: asus-wmi: fix resource leaks on probe failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93116.json",
      "version": "3"
    }
  }
}



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