CVE-2026-45877: HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients
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->referencecount 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 [intelishipc]
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45877?
The severity of CVE-2026-45877 is rated as 27.
How do I fix CVE-2026-45877?
To fix CVE-2026-45877, update the Linux kernel to the latest version that addresses this NULL pointer dereference issue.
What component is affected by CVE-2026-45877?
CVE-2026-45877 affects the Intel intel_ishtp (intel-ish-hid) component within the Linux kernel.
What type of vulnerability is CVE-2026-45877?
CVE-2026-45877 is a NULL pointer dereference vulnerability that can occur during the warm reset flow.
When was CVE-2026-45877 published?
CVE-2026-45877 was published on May 27, 2026.