CVE-2026-45877

In the Linux kernel, the following vulnerability has been resolved:

HID: intel-ish-hid: fix NULL-ptr-deref in ishtpbusremoveallclients

During a warm reset flow, the cl->device pointer may be NULL if the reset occurs while clients are still being enumerated. Accessing cl->device->reference_count without a NULL check leads to a kernel panic.

This issue was identified during multi-unit warm reboot stress clycles. Add a defensive NULL check for cl->device to ensure stability under such intensive testing conditions.

KASAN: null-ptr-deref in range [0000000000000000-0000000000000007] Workqueue: ishfwupdatewq fwresetworkfn

Call Trace: ishtpbusremoveallclients+0xbe/0x130 [intelishtp] ishtpresethandler+0x85/0x1a0 [intelishtp] fwresetworkfn+0x8a/0xc0 [intelish_ipc]