CVE-2026-81017

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81017", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.813Z", "datePublished": "2026-09-11T19:43:05.409Z", "dateUpdated": "2026-10-19T08:46:42.592Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:42.592Z"}, "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."}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - The OOB is reached from the Chrome EC MKBP IRQ path (cros_ec_irq_thread \u2192 event_notifier \u2192 cros_ec_sensorhub_event \u2192 cros_ec_sensorhub_ring_handler) on an internally connected LPC/SPI/I2C/ISH coprocessor, not from network packets or a pluggable USB device.\nAC:L - A malicious or compromised EC fully controls each FIFO event\u2019s sensor_num, flags, and timestamp from MOTIONSENSE_CMD_FIFO_READ. A non-timestamp event with sensor_num >= sensorhub->sensor_num deterministically indexes batch_state[] out of bounds with no race.\nPR:N - The FIFO handler runs from the EC IRQ notifier with no Linux capability or credential check, and interrupts are armed at probe via cros_ec_sensorhub_ring_fifo_enable(). Compromised EC firmware can deliver EC_MKBP_EVENT_SENSOR_FIFO events without a host account.\nUI:N - Sensor FIFO collection is enabled automatically at driver probe and proceeds on EC interrupts; no victim must open a device, mount a filesystem, or otherwise interact.\nS:U - The corruption is kernel heap in the same host OS that runs the sensorhub driver. This is ordinary kernel memory corruption, not a VM escape, IOMMU bypass, or other changed-scope boundary.\nC:H - Attacker-controlled 8-bit sensor_num indexes batch_state[] (allocated only for sensorhub->sensor_num entries), enabling an out-of-bounds read of adjacent heap via newest_sensor_event/last_ts. Unbounded OOB reads score Confidentiality High.\nI:H - ODR, FLUSH, and sample processing write last_len, penul_len, and newest_sensor_event at the attacker-chosen index, yielding a heap out-of-bounds write that can corrupt neighboring objects and hijack kernel control flow.\nA:H - Out-of-bounds heap access of batch_state[] can oops or panic the kernel when it hits unmapped or poisoned memory, so Availability is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/chrome/cros_ec_sensorhub_ring.c"], "versions": [{"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "3a76b87e1d065183e2e7ae5b800cb1f6e84f543d", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "2b602ecf6193ecb9720c78b6728d7e09370b1ff1", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "324880f94ba3c6269a607e04f78a4dd4a66b3f53", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "d1b4add68dabfdd6481a4fa198bf3b473d2634d7", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "3d2636dce0a8fe9eecad29010699847be425dc80", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "5eaf7faa99578ae090030d1e2e6ea3b37a615496", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "4d9bf63ed74f859c6698bc01d8fb216ef9253867", "status": "affected", "versionType": "git"}, {"version": "145d59baff5944b71551ac518d7fd7d377a9c820", "lessThan": "833740a2333c2e4db4e02e3d0ffba04e8718a5f3", "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/platform/chrome/cros_ec_sensorhub_ring.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "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", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867"}, {"url": "https://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3"}], "title": "platform/chrome: sensorhub: Bound the EC-reported sensor number", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/platform/chrome/cros_ec_sensorhub_ring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3a76b87e1d065183e2e7ae5b800cb1f6e84f543d", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "2b602ecf6193ecb9720c78b6728d7e09370b1ff1", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "324880f94ba3c6269a607e04f78a4dd4a66b3f53", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "d1b4add68dabfdd6481a4fa198bf3b473d2634d7", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "3d2636dce0a8fe9eecad29010699847be425dc80", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "5eaf7faa99578ae090030d1e2e6ea3b37a615496", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "4d9bf63ed74f859c6698bc01d8fb216ef9253867", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}, {"lessThan": "833740a2333c2e4db4e02e3d0ffba04e8718a5f3", "status": "affected", "version": "145d59baff5944b71551ac518d7fd7d377a9c820", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/platform/chrome/cros_ec_sensorhub_ring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "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."}], "id": "CVE-2026-81017", "lastModified": "2026-10-19T09:17:35.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:10.680", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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", "url": "https://git.kernel.org/stable/c/3a76b87e1d065183e2e7ae5b800cb1f6e84f543d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1b4add68dabfdd6481a4fa198bf3b473d2634d7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Memory corruption in sensorhub", "id": "2532430", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532430"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's `sensorhub` component. A local attacker could provide a maliciously crafted sensor number in an EC FIFO event. This unchecked sensor number could lead to an out-of-bounds read and write in the `batch_state` array, potentially causing memory corruption or system instability."], "name": "CVE-2026-81017", "public_date": "2026-09-11T19:43:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81017\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81017\nhttps://git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80\nhttps://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867\nhttps://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496\nhttps://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[145d59baff5944b71551ac518d7fd7d377a9c820,3d2636dce0a8fe9eecad29010699847be425dc80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[145d59baff5944b71551ac518d7fd7d377a9c820,5eaf7faa99578ae090030d1e2e6ea3b37a615496)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[145d59baff5944b71551ac518d7fd7d377a9c820,4d9bf63ed74f859c6698bc01d8fb216ef9253867)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[145d59baff5944b71551ac518d7fd7d377a9c820,833740a2333c2e4db4e02e3d0ffba04e8718a5f3)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T20:30:17.962969+00:00", "updated": "2026-09-21T01:45:07.962093+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}