CVE-2026-81017

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: platform/chrome: sensorhub: Bound the EC-reported sensor number Each EC FIFO event carries an 8-bit sensor number (in->sensor_num). cros_ec_sensorhub_ring_handler() validates the FIFO event count, the per-read count and the ring bound, but not the sensor number, which cros_ec_sensor_ring_process_event() then uses unchecked to index sensorhub->batch_state[] - allocated with only sensorhub->sensor_num entries. A sensor number of sensor_num or larger is an out-of-bounds read and write of batch_state[]. Validate the sensor number in the ring handler, where each event is read from the EC, and drop a malformed event before it is used.

Severity

HIGH

CVSS score

8.4 (v3.1)

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-11 20:19:10.680000

Last modified

2026-10-19 09:17:35.170000

View original CVE JSON

{
  "id": "CVE-2026-81017",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-11T20:19:10.680",
  "lastModified": "2026-10-19T09:17:35.170",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/chrome: sensorhub: Bound the EC-reported sensor number\n\nEach EC FIFO event carries an 8-bit sensor number (in->sensor_num).\ncros_ec_sensorhub_ring_handler() validates the FIFO event count, the\nper-read count and the ring bound, but not the sensor number, which\ncros_ec_sensor_ring_process_event() then uses unchecked to index\nsensorhub->batch_state[] - allocated with only sensorhub->sensor_num\nentries. A sensor number of sensor_num or larger is an out-of-bounds\nread and write of batch_state[].\n\nValidate the sensor number in the ring handler, where each event is read\nfrom the EC, and drop a malformed event before it is used."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/platform/chrome/cros_ec_sensorhub_ring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "3a76b87e1d065183e2e7ae5b800cb1f6e84f543d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "2b602ecf6193ecb9720c78b6728d7e09370b1ff1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "324880f94ba3c6269a607e04f78a4dd4a66b3f53",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "d1b4add68dabfdd6481a4fa198bf3b473d2634d7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "3d2636dce0a8fe9eecad29010699847be425dc80",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "5eaf7faa99578ae090030d1e2e6ea3b37a615496",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "4d9bf63ed74f859c6698bc01d8fb216ef9253867",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "145d59baff5944b71551ac518d7fd7d377a9c820",
              "lessThan": "833740a2333c2e4db4e02e3d0ffba04e8718a5f3",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/platform/chrome/cros_ec_sensorhub_ring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.7",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.7",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.270",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.221",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.188",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.157",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.109",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.50",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.4",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2b602ecf6193ecb9720c78b6728d7e09370b1ff1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/324880f94ba3c6269a607e04f78a4dd4a66b3f53",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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    },
    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
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    {
      "url": "https://git.kernel.org/stable/c/d1b4add68dabfdd6481a4fa198bf3b473d2634d7",
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    }
  ]
}