{"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":"2026-09-18T17:56:26.212Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-18T17:56:26.212Z"},"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-rc1","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-rc1"}]}]}],"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"}}}}