---
cve: "CVE-2026-93189"
severity: "HIGH"
cvss: 8.8
epss: "0.3%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-17 17:18:15"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T03:51:01+02:00"
---

# CVE-2026-93189

> 8.8 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.270
- Kernel ≥ 5.15.221
- Kernel ≥ 6.1.188
- Kernel ≥ 6.6.157
- Kernel ≥ 6.12.110
- Kernel ≥ 6.18.52
- Kernel ≥ 7.2.6

## Referenzen

- <https://git.kernel.org/stable/c/0744cb9520aade37e78f69134f3111086158f1d2>
- <https://git.kernel.org/stable/c/c876c437d188911685d8bed645416f2e86bd0354>
- <https://git.kernel.org/stable/c/6787f1828f5616f17250e108c0031fb96fd2cfe6>
- <https://git.kernel.org/stable/c/92cca302a4eaf65d1b38b3fb600b4ee5eb856a51>
- <https://git.kernel.org/stable/c/02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87>
- <https://git.kernel.org/stable/c/544ebb25bd58f67e821573412ab7a982b9e02211>
- <https://git.kernel.org/stable/c/0fecd89f979a8653b9a5b0816570329b7a94a081>
- <https://git.kernel.org/stable/c/a4bc41504690b7d7064931909874f5b98cd148b6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-93189) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_