CVE-2026-93189

Debolezza

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 drive

Riferimenti

• https://git.kernel.org/stable/c/02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87
• https://git.kernel.org/stable/c/0744cb9520aade37e78f69134f3111086158f1d2
• https://git.kernel.org/stable/c/0fecd89f979a8653b9a5b0816570329b7a94a081
• https://git.kernel.org/stable/c/544ebb25bd58f67e821573412ab7a982b9e02211
• https://git.kernel.org/stable/c/6787f1828f5616f17250e108c0031fb96fd2cfe6
• https://git.kernel.org/stable/c/92cca302a4eaf65d1b38b3fb600b4ee5eb856a51