264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-81017",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.813Z",
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"datePublished": "2026-09-11T19:43:05.409Z",
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"dateUpdated": "2026-10-19T08:46:42.592Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T08:46:42.592Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The OOB is reached from the Chrome EC MKBP IRQ path (cros_ec_irq_thread → event_notifier → cros_ec_sensorhub_event → 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’s 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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/platform/chrome/cros_ec_sensorhub_ring.c"
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],
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"versions": [
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "3a76b87e1d065183e2e7ae5b800cb1f6e84f543d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "2b602ecf6193ecb9720c78b6728d7e09370b1ff1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "324880f94ba3c6269a607e04f78a4dd4a66b3f53",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "d1b4add68dabfdd6481a4fa198bf3b473d2634d7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "3d2636dce0a8fe9eecad29010699847be425dc80",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "5eaf7faa99578ae090030d1e2e6ea3b37a615496",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "4d9bf63ed74f859c6698bc01d8fb216ef9253867",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "145d59baff5944b71551ac518d7fd7d377a9c820",
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"lessThan": "833740a2333c2e4db4e02e3d0ffba04e8718a5f3",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/platform/chrome/cros_ec_sensorhub_ring.c"
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],
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"versions": [
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{
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"version": "5.7",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.7",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.109",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.50",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.4",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"versionStartIncluding": "5.7",
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"versionEndExcluding": "5.10.270"
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"references": [
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"url": "https://git.kernel.org/stable/c/3a76b87e1d065183e2e7ae5b800cb1f6e84f543d"
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},
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{
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"url": "https://git.kernel.org/stable/c/2b602ecf6193ecb9720c78b6728d7e09370b1ff1"
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},
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{
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"url": "https://git.kernel.org/stable/c/324880f94ba3c6269a607e04f78a4dd4a66b3f53"
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},
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{
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"url": "https://git.kernel.org/stable/c/d1b4add68dabfdd6481a4fa198bf3b473d2634d7"
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},
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{
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"url": "https://git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80"
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},
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{
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"url": "https://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867"
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},
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{
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"url": "https://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3"
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}
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],
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"title": "platform/chrome: sensorhub: Bound the EC-reported sensor number",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |