CVE-2026-64603 (GCVE-0-2026-64603)
Vulnerability from cvelistv5
Published
2026-08-06 07:13
Modified
2026-08-17 04:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/x86: intel-hid: Protect ACPI notify handler against recursion Since commit e2ffcda16290 ("ACPI: OSL: Allow Notify () handlers to run on all CPUs") ACPI notify handlers like the intel-hid notify_handler() may run on multiple CPU cores racing with themselves. On convertibles and detachables (matched by DMI chassis-type 31 and 32 in dmi_auto_add_switch[]) the SW_TABLET_MODE input device is registered lazily from notify_handler() on the first tablet-mode event, via intel_hid_switches_setup(). When two such events race on different CPUs both can pass the !priv->switches check and register the priv->switches input device twice, resulting in a duplicate sysfs entry and a subsequent NULL pointer dereference. This is the same class of bug fixed by commit e075c3b13a0a ("platform/x86: intel-vbtn: Protect ACPI notify handler against recursion") for the sibling intel-vbtn driver. Protect intel-hid notify_handler() from racing with itself with a mutex to fix this.
References
Impacted products
Vendor Product Version
Linux Linux Version: e2ffcda1629012a2c1a3706432bc45fdc899a584
Version: e2ffcda1629012a2c1a3706432bc45fdc899a584
Version: e2ffcda1629012a2c1a3706432bc45fdc899a584
Version: e2ffcda1629012a2c1a3706432bc45fdc899a584
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/intel/hid.c"
          ],
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          "vendor": "Linux",
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          "vendor": "Linux",
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      "cpeApplicability": [
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                  "versionEndExcluding": "6.12.96",
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: intel-hid: Protect ACPI notify handler against recursion\n\nSince commit e2ffcda16290 (\"ACPI: OSL: Allow Notify () handlers to run on\nall CPUs\") ACPI notify handlers like the intel-hid notify_handler() may\nrun on multiple CPU cores racing with themselves.\n\nOn convertibles and detachables (matched by DMI chassis-type 31 and 32 in\ndmi_auto_add_switch[]) the SW_TABLET_MODE input device is registered\nlazily from notify_handler() on the first tablet-mode event, via\nintel_hid_switches_setup(). When two such events race on different CPUs\nboth can pass the !priv-\u003eswitches check and register the priv-\u003eswitches\ninput device twice, resulting in a duplicate sysfs entry and a subsequent\nNULL pointer dereference.\n\nThis is the same class of bug fixed by commit e075c3b13a0a (\"platform/x86:\nintel-vbtn: Protect ACPI notify handler against recursion\") for the\nsibling intel-vbtn driver.\n\nProtect intel-hid notify_handler() from racing with itself with a mutex\nto fix this."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:58:26.397Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a6402808e552e44e9c26a9fe8395ac11703d5800"
        },
        {
          "url": "https://git.kernel.org/stable/c/86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/eace3b3e729d5ba11794d69acfafb58a7950217c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c085d82613d5618814b84406c8b2d64f1bc305e7"
        }
      ],
      "title": "platform/x86: intel-hid: Protect ACPI notify handler against recursion",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64603",
    "datePublished": "2026-08-06T07:13:55.114Z",
    "dateReserved": "2026-07-19T15:36:31.799Z",
    "dateUpdated": "2026-08-17T04:58:26.397Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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