CVE-2026-89626

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If sysfs_create_group() fails after some groups\nhave already been created, the function returns the error without\nremoving the previously created groups.\n\nAdd a local unwind path to remove the groups that were already created.\nWith enable_sensor exposed only after the field attributes are ready,\nthis path can free sensor_inst->fields without leaving enable_sensor\nable to access pointers into that array."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - hid-sensor-hub matches HID_BUS_ANY HID_GROUP_SENSOR_HUB devices and instantiates HID-SENSOR-2000e1/2000e2, so a Bluetooth HID/HoGP peer in radio range can supply a crafted custom-sensor descriptor that probes hid-sensor-custom; USB attach is only a lower-severity physical path.\nAC:L - Duplicate feature/input field group names in the attacker-controlled HID descriptor make sysfs_create_group() fail with -EEXIST after earlier groups are installed, so the missing unwind runs deterministically with no attacker-uncontrollable race or memory layout.\nPR:N - hid_sensor_custom_probe() runs from HID/MFD enumeration when the Bluetooth or USB sensor-hub connects and needs no local account, capability, or userspace authorization.\nUI:N - Probe and sysfs group creation run automatically on HID connect; leftover field attributes are then hit by udev and ordinary sysfs reads with no separate victim mount or file-open action.\nS:U - The leftover sysfs groups and use-after-free of probe-allocated hid_sensor_custom state remain in the host kernel and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - Failed probe leaves field sysfs groups in place while really_probe() device_unbind_cleanup() frees the devm hid_sensor_custom object, so in-progress or later show_value() is a slab use-after-free enabling arbitrary kernel read.\nI:H - The same dangling sysfs show/store path runs against freed hid_sensor_custom state (fields, mutex, hid-sensor-hub pointers), a heap UAF that can be sprayed for arbitrary write and control-flow hijack.\nA:H - Accessing leftover field attributes after probe failure NULL-dereferences cleared drvdata or uses freed sensor_inst, causing kernel oops/panic; any UAF is High availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-sensor-custom.c"], "versions": [{"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "416194933af63bd58d03b7605b1ebc1711186838", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "d0e15091e88d18e30b67daf85b88f6528bb9bf41", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "10b05fafff932e325896d59dde40938954ab4577", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "2409779f3096fcef41bcf57b5f4887d0fa0dc8dd", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "79154fad98ee843e5363940841e2d831503c190a", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "f3f37b937a6ea2a00fb5e6189e74f855caa43eb5", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "d96f8958d4469ac02d9c563686cdd968005b944d", "status": "affected", "versionType": "git"}, {"version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "3789d0802ddb4b3be04062caf4bfadd23496e9a7", "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/hid/hid-sensor-custom.c"], "versions": [{"version": "4.1", "status": "affected"}, {"version": "0", "lessThan": "4.1", "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": "4.1", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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"https://git.kernel.org/stable/c/3789d0802ddb4b3be04062caf4bfadd23496e9a7"}], "title": "HID: sensor: custom: Fix field sysfs group cleanup on failure", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-89626", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:24:35.586739Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:45.215Z"}}]}}

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leftover field attributes are then hit by udev and ordinary sysfs reads with no separate victim mount or file-open action.\nS:U - The leftover sysfs groups and use-after-free of probe-allocated hid_sensor_custom state remain in the host kernel and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - Failed probe leaves field sysfs groups in place while really_probe() device_unbind_cleanup() frees the devm hid_sensor_custom object, so in-progress or later show_value() is a slab use-after-free enabling arbitrary kernel read.\nI:H - The same dangling sysfs show/store path runs against freed hid_sensor_custom state (fields, mutex, hid-sensor-hub pointers), a heap UAF that can be sprayed for arbitrary write and control-flow hijack.\nA:H - Accessing leftover field attributes after probe failure NULL-dereferences cleared drvdata or uses freed sensor_inst, causing kernel oops/panic; any UAF is High availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "416194933af63bd58d03b7605b1ebc1711186838", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "d0e15091e88d18e30b67daf85b88f6528bb9bf41", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "10b05fafff932e325896d59dde40938954ab4577", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "2409779f3096fcef41bcf57b5f4887d0fa0dc8dd", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "79154fad98ee843e5363940841e2d831503c190a", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "f3f37b937a6ea2a00fb5e6189e74f855caa43eb5", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "d96f8958d4469ac02d9c563686cdd968005b944d", "versionType": "git"}, {"status": "affected", "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d", "lessThan": "3789d0802ddb4b3be04062caf4bfadd23496e9a7", "versionType": "git"}], "programFiles": ["drivers/hid/hid-sensor-custom.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.1"}, {"status": "unaffected", "version": "0", "lessThan": "4.1", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.270", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.109", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.50", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hid/hid-sensor-custom.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/416194933af63bd58d03b7605b1ebc1711186838"}, {"url": "https://git.kernel.org/stable/c/d0e15091e88d18e30b67daf85b88f6528bb9bf41"}, {"url": "https://git.kernel.org/stable/c/10b05fafff932e325896d59dde40938954ab4577"}, {"url": "https://git.kernel.org/stable/c/2409779f3096fcef41bcf57b5f4887d0fa0dc8dd"}, {"url": "https://git.kernel.org/stable/c/79154fad98ee843e5363940841e2d831503c190a"}, {"url": "https://git.kernel.org/stable/c/f3f37b937a6ea2a00fb5e6189e74f855caa43eb5"}, {"url": "https://git.kernel.org/stable/c/d96f8958d4469ac02d9c563686cdd968005b944d"}, {"url": "https://git.kernel.org/stable/c/3789d0802ddb4b3be04062caf4bfadd23496e9a7"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: sensor: custom: Fix field sysfs group cleanup on failure\n\nhid_sensor_custom_add_attributes() creates one sysfs group for each\ncustom sensor field. If sysfs_create_group() fails after some groups\nhave already been created, the function returns the error without\nremoving the previously created groups.\n\nAdd a local unwind path to remove the groups that were already created.\nWith enable_sensor exposed only after the field attributes are ready,\nthis path can free sensor_inst->fields without leaving enable_sensor\nable to access pointers into that array."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.270", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.221", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.188", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.157", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.109", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.50", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2.4", "versionStartIncluding": "4.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.3", "versionStartIncluding": "4.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:49:58.552Z"}}}, "cveMetadata": {"cveId": "CVE-2026-89626", "state": "PUBLISHED", "dateUpdated": "2026-10-19T08:49:58.552Z", "dateReserved": "2026-09-11T19:38:34.737Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-09-11T19:45:22.769Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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If sysfs_create_group() fails after some groups\nhave already been created, the function returns the error without\nremoving the previously created groups.\n\nAdd a local unwind path to remove the groups that were already created.\nWith enable_sensor exposed only after the field attributes are ready,\nthis path can free sensor_inst->fields without leaving enable_sensor\nable to access pointers into that array."}], "id": "CVE-2026-89626", "lastModified": "2026-10-19T09:17:59.450", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-89626", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:24:35.586739Z", "version": "2.0.3"}}]}, "published": "2026-09-11T20:19:48.023", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10b05fafff932e325896d59dde40938954ab4577"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2409779f3096fcef41bcf57b5f4887d0fa0dc8dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3789d0802ddb4b3be04062caf4bfadd23496e9a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/416194933af63bd58d03b7605b1ebc1711186838"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/79154fad98ee843e5363940841e2d831503c190a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d0e15091e88d18e30b67daf85b88f6528bb9bf41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d96f8958d4469ac02d9c563686cdd968005b944d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f3f37b937a6ea2a00fb5e6189e74f855caa43eb5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: HID sensor custom driver resource management vulnerability", "id": "2532034", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532034"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's Human Interface Device (HID) sensor custom driver. When creating sysfs groups for custom sensor fields, the `hid_sensor_custom_add_attributes()` function fails to properly clean up previously created groups if an error occurs. This improper resource management could lead to system instability or a denial of service (DoS) condition."], "name": "CVE-2026-89626", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:45:22Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89626\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89626\nhttps://git.kernel.org/stable/c/3789d0802ddb4b3be04062caf4bfadd23496e9a7\nhttps://git.kernel.org/stable/c/79154fad98ee843e5363940841e2d831503c190a\nhttps://git.kernel.org/stable/c/d96f8958d4469ac02d9c563686cdd968005b944d\nhttps://git.kernel.org/stable/c/f3f37b937a6ea2a00fb5e6189e74f855caa43eb5"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4a7de0519df5e8fb89cef6ee062330ffe4b50a4d,79154fad98ee843e5363940841e2d831503c190a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4a7de0519df5e8fb89cef6ee062330ffe4b50a4d,f3f37b937a6ea2a00fb5e6189e74f855caa43eb5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4a7de0519df5e8fb89cef6ee062330ffe4b50a4d,d96f8958d4469ac02d9c563686cdd968005b944d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4a7de0519df5e8fb89cef6ee062330ffe4b50a4d,3789d0802ddb4b3be04062caf4bfadd23496e9a7)"}}], "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": "generic", "value": "4.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.1)"}}, {"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": "2026-09-12T05:00:08.299966+00:00", "updated": "2026-09-15T21:15:14.623241+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}