{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89626", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.737Z", "datePublished": "2026-09-11T19:45:22.769Z", "dateUpdated": "2026-10-19T08:49:58.552Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:49:58.552Z" }, "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." } ], "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "7.3" } ] } ] } ], "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" } ], "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" } } ] } }