Description
In the Linux kernel, the following vulnerability has been resolved: HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients 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: ish_fw_update_wq fw_reset_work_fn Call Trace: ishtp_bus_remove_all_clients+0xbe/0x130 [intel_ishtp] ishtp_reset_handler+0x85/0x1a0 [intel_ishtp] fw_reset_work_fn+0x8a/0xc0 [intel_ish_ipc]
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/0b605e8ce60698c27a26f512968a597fd620d2e8 Patch
- git.kernel.org/stable/c/272dac57caa981718e7188c80c703e7bb1998054 Patch
- git.kernel.org/stable/c/56f7db581ee73af53cd512e00a6261a025bf1d58 Patch
- git.kernel.org/stable/c/feb4bcfd405282de60aba321f13a1272b30c5af4 Patch
- git.kernel.org/stable/c/08baf418d79d289a7bc38be519289b3a48b83da9
- git.kernel.org/stable/c/cde7f709d1025dadfc52e903e43981c1644bd8bd
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 8 · as of 14 November 2026
- CWE
- CWE-476
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.