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CVE-2026-93189

Vulnérabilité élevée dans Linux (Linux)

CVSS 8.8 · Élevée
EPSS 0.3%
Linux•Linux•Versions : <6.6.157, <=6.1.*, <=6.12.*, <5.15.221, 5.15.221, 5.10.270, 0, 6.1.188, 6.18.52, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, <=5.10.*, <=6.6.*, 6.6.157, <6787f1828f5616f17250e108c0031fb96fd2cfe6, 7.2.6, <02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87, <=6.18.*, <a4bc41504690b7d7064931909874f5b98cd148b6, <5.10.270, <7.2.6, 6.12.110, <=7.2.*, <6.12.110, <0fecd89f979a8653b9a5b0816570329b7a94a081, <c876c437d188911685d8bed645416f2e86bd0354, <6.18.52, <=*, <92cca302a4eaf65d1b38b3fb600b4ee5eb856a51, <=5.15.*, <544ebb25bd58f67e821573412ab7a982b9e02211, <6.1.188, <0744cb9520aade37e78f69134f3111086158f1d2, 7.3

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.

Gravité et risque d'exploitation

CVE-2026-93189 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.31 %, ce qui la place devant 22.7 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <6.6.157, <=6.1.*, <=6.12.*, <5.15.221, 5.15.221, 5.10.270, 0, 6.1.188, 6.18.52, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, <=5.10.*, <=6.6.*, 6.6.157, <6787f1828f5616f17250e108c0031fb96fd2cfe6, 7.2.6, <02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87, <=6.18.*, <a4bc41504690b7d7064931909874f5b98cd148b6, <5.10.270, <7.2.6, 6.12.110, <=7.2.*, <6.12.110, <0fecd89f979a8653b9a5b0816570329b7a94a081, <c876c437d188911685d8bed645416f2e86bd0354, <6.18.52, <=*, <92cca302a4eaf65d1b38b3fb600b4ee5eb856a51, <=5.15.*, <544ebb25bd58f67e821573412ab7a982b9e02211, <6.1.188, <0744cb9520aade37e78f69134f3111086158f1d2, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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