CVE-2026-93189— HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，已修复以下漏洞： HID: core: 在 hid_hw_stop() 中静默输入，以防止 use-after-free（释放后使用） 问题描述： 某个驱动的 probe 函数调用 以启用输入事件传递，但在后续初始化步骤失败时，通过 进行回溯清理（unwind）。回溯过程会通过 释放 对象，但此时可能仍有正在其他 CPU 上运行的在途 HID 报告，导致通过 解引用已释放的对象。syzbot 报告了在 corsair-psu HID 驱动中由此产生的“释放后使用”（use-after-fre
Possible ATT&CK Techniques 1 AI
T1015Affected Version Matrix 23
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0744cb9520aade37e78f69134f3111086158f1d2 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c876c437d188911685d8bed645416f2e86bd0354 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6787f1828f5616f17250e108c0031fb96fd2cfe6 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 92cca302a4eaf65d1b38b3fb600b4ee5eb856a51 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 544ebb25bd58f67e821573412ab7a982b9e02211 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0fecd89f979a8653b9a5b0816570329b7a94a081 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a4bc41504690b7d7064931909874f5b98cd148b6 |
affected | ||
| … +15 more rows | |||
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I. Basic Information for CVE-2026-93189
Vulnerability Information
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Vulnerability Title
HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
A driver's probe calls hid_device_io_start() to enable input delivery,
then fails at a later initialization step and unwinds via hid_hw_stop().
The unwind frees struct hidraw via hidraw_disconnect() while in-flight
HID reports may still be running on another CPU, dereferencing the
freed object through hidraw_report_event(). syzbot reports the
resulting use-after-free for the corsair-psu HID driver.
Edward Adam Davis posted a per-driver fix for corsair-psu that adds
an explicit hid_device_io_stop() before hid_hw_stop() in the probe
error path ("hwmon: prevent packets from going to driver for probe",
2026-04-28). Auditing the tree shows 15 drivers call
hid_device_io_start(); 7 also call hid_device_io_stop() and 8 do not:
drivers calling hid_device_io_start() without a matching
hid_device_io_stop() before hid_hw_stop():
drivers/hwmon/corsair-psu.c (fix posted by Edward)
drivers/hwmon/corsair-cpro.c
drivers/hwmon/nzxt-kraken3.c
drivers/hwmon/nzxt-smart2.c
drivers/hwmon/gigabyte_waterforce.c
drivers/hid/hid-logitech-dj.c
drivers/hid/hid-nintendo.c
drivers/hid/hid-mcp2221.c
Roughly half of all callers of the API are exposed. Centralize the
quiesce in hid_hw_stop() so callers do not have to remember the
matching stop: if a driver has left hdev->io_started true on entry,
call hid_device_io_stop() before hid_disconnect().
For the 7 drivers that already call hid_device_io_stop() correctly,
hdev->io_started is false on entry, the guard short-circuits, and
behavior is unchanged.
No Fixes: tag because the affected drivers gained their
hid_device_io_start() calls independently over years; the bug is a
class-wide API misuse rather than a regression from one commit.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-93189
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-93189 (8)
Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total
| CVE-2026-92489 | 9.8 CRITICAL | xfrm: Fix skb double-free in xfrm_dev_direct_output() |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4: remove callback IDR entry on client allocation failure |
| CVE-2026-90173 | 9.8 CRITICAL | smb: smbdirect: free completion queues with ib_free_cq() |
| CVE-2026-90235 | 9.8 CRITICAL | sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1: zero referring call lists before decoding |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer: randomize RB-tree node comparison using SipHash |
| CVE-2026-90230 | 9.1 CRITICAL | nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate() |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert: reject login PDUs declaring more data than was received |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert: reject PDUs declaring more data than was received |
| CVE-2026-90329 | 8.8 HIGH | HID: synchronize input before cleaning up a failed probe |
| CVE-2026-90286 | 8.8 HIGH | drm/amdgpu/gfx6: Use PFP on the compute queues too |
| CVE-2026-90357 | 8.8 HIGH | wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement |
| CVE-2026-90367 | 8.8 HIGH | wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER |
| CVE-2026-90162 | 8.8 HIGH | ksmbd: defer publishing granted locks to prevent UAF/double-free race |
| CVE-2026-90371 | 8.8 HIGH | wifi: mt76: fix RXDMAD_C buffer recycling race |
| CVE-2026-90425 | 8.8 HIGH | iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID |
| CVE-2026-90240 | 8.8 HIGH | iommu/vt-d: Flush context cache with correct SID when tearing down aliases |
| CVE-2026-90255 | 8.8 HIGH | Bluetooth: hci_conn: fix the SCO setup context lifetime |
| CVE-2026-90256 | 8.8 HIGH | Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind |
| CVE-2026-90381 | 8.8 HIGH | wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx() |
Showing top 20 of 600 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
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batman-adv: dat: atomically update mac addresses -
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i3c: master: Fix recursive locking during device registratio -
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V. Comments for CVE-2026-93189
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