{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-93189", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.091Z", "datePublished": "2026-09-17T16:12:14.234Z", "dateUpdated": "2026-10-19T09:07:01.914Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:07:01.914Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: quiesce input in hid_hw_stop() to prevent use-after-free\n\nA driver's probe calls hid_device_io_start() to enable input delivery,\nthen fails at a later initialization step and unwinds via hid_hw_stop().\nThe unwind frees struct hidraw via hidraw_disconnect() while in-flight\nHID reports may still be running on another CPU, dereferencing the\nfreed object through hidraw_report_event(). syzbot reports the\nresulting use-after-free for the corsair-psu HID driver.\n\nEdward Adam Davis posted a per-driver fix for corsair-psu that adds\nan explicit hid_device_io_stop() before hid_hw_stop() in the probe\nerror path (\"hwmon: prevent packets from going to driver for probe\",\n2026-04-28). Auditing the tree shows 15 drivers call\nhid_device_io_start(); 7 also call hid_device_io_stop() and 8 do not:\n\n drivers calling hid_device_io_start() without a matching\n hid_device_io_stop() before hid_hw_stop():\n drivers/hwmon/corsair-psu.c (fix posted by Edward)\n drivers/hwmon/corsair-cpro.c\n drivers/hwmon/nzxt-kraken3.c\n drivers/hwmon/nzxt-smart2.c\n drivers/hwmon/gigabyte_waterforce.c\n drivers/hid/hid-logitech-dj.c\n drivers/hid/hid-nintendo.c\n drivers/hid/hid-mcp2221.c\n\nRoughly half of all callers of the API are exposed. Centralize the\nquiesce in hid_hw_stop() so callers do not have to remember the\nmatching stop: if a driver has left hdev->io_started true on entry,\ncall hid_device_io_stop() before hid_disconnect().\n\nFor the 7 drivers that already call hid_device_io_stop() correctly,\nhdev->io_started is false on entry, the guard short-circuits, and\nbehavior is unchanged.\n\nNo Fixes: tag because the affected drivers gained their\nhid_device_io_start() calls independently over years; the bug is a\nclass-wide API misuse rather than a regression from one commit." } ], "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 - HIDP interrupt payloads racing hid_hw_stop() enter via hidp_recv_intr_frame() -> hidp_process_report() -> hid_input_report() -> hid_report_raw_event() -> hidraw_report_event(). nintendo_hid_probe() matches HID_BLUETOOTH_DEVICE Joy-Con/Pro IDs after hidp_session_dev_add()->hid_add_device(), so those reports come from a radio-adjacent HIDP peer.\nAC:L - After hid_device_io_start() in nintendo_hid_probe(), the peer fails joycon_init() (joycon_read_info() or joycon_set_report_mode()) so err_close calls hid_hw_stop() without hid_device_io_stop(), and concurrently sends HIDP_TRANS_DATA|HIDP_DATA_RTYPE_INPUT frames so hidraw_report_event() runs during hidraw_disconnect(); the attacker drives both sides.\nPR:N - hid_device_probe() binds the HID device with no host uid or capability check. A Bluetooth HID peripheral delivering hidp interrupt frames needs no Linux account; CAP_NET_ADMIN is only for bluetoothd HIDPCONNADD, not for the reporting device.\nUI:N - hidp_session_dev_work() calls hidp_session_dev_add()->hid_add_device(), which runs nintendo_hid_probe() automatically; after hid_device_io_start(), the peer's interrupt reports and the probe-fail hid_hw_stop() path need no victim open, mount, or click.\nS:U - The use-after-free is of host-kernel struct hidraw inside hid_hw_stop()->hid_disconnect()->hidraw_disconnect()->drop_ref(); it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - hid_report_raw_event() can enter hidraw_report_event() and take hidraw->list_lock on the object already kfree'd by drop_ref() from hid_hw_stop()'s hidraw_disconnect(), a use-after-free reusable for an arbitrary kernel read.\nI:H - The same freed hidraw is written from hidraw_report_event() (list_lock, kmemdup into list buffers, wake_up_interruptible on hidraw->wait) and can be sprayed, yielding an arbitrary write or control-flow hijack primitive.\nA:H - hidraw_report_event() taking the freed hidraw->list_lock or waking hidraw->wait after drop_ref()'s kfree oopses or panics the kernel even when the UAF is not fully exploited." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/hid-core.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0744cb9520aade37e78f69134f3111086158f1d2", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c876c437d188911685d8bed645416f2e86bd0354", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6787f1828f5616f17250e108c0031fb96fd2cfe6", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "92cca302a4eaf65d1b38b3fb600b4ee5eb856a51", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "544ebb25bd58f67e821573412ab7a982b9e02211", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0fecd89f979a8653b9a5b0816570329b7a94a081", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a4bc41504690b7d7064931909874f5b98cd148b6", "status": "affected", "versionType": "git" }, { "version": "0", "lessThan": "5.10.270", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "5.15.221", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.1.188", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.6.157", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.12.110", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.18.52", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "7.2.6", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/hid-core.c" ], "versions": [ { "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": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.6", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0744cb9520aade37e78f69134f3111086158f1d2" }, { "url": "https://git.kernel.org/stable/c/c876c437d188911685d8bed645416f2e86bd0354" }, { "url": "https://git.kernel.org/stable/c/6787f1828f5616f17250e108c0031fb96fd2cfe6" }, { "url": "https://git.kernel.org/stable/c/92cca302a4eaf65d1b38b3fb600b4ee5eb856a51" }, { "url": "https://git.kernel.org/stable/c/02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87" }, { "url": "https://git.kernel.org/stable/c/544ebb25bd58f67e821573412ab7a982b9e02211" }, { "url": "https://git.kernel.org/stable/c/0fecd89f979a8653b9a5b0816570329b7a94a081" }, { "url": "https://git.kernel.org/stable/c/a4bc41504690b7d7064931909874f5b98cd148b6" } ], "title": "HID: core: quiesce input in hid_hw_stop() to prevent use-after-free", "x_generator": { "engine": "bippy-1.2.0" } } } }