CVE-2024-26770

What it actually does

Missing null pointer check after devm_kasprintf() in nvidia-shield HID LED initialization allows potential NULL dereference, leading to memory corruption or kernel panic on allocation failure.

Why it matters to the business

System crashes or instability on Linux kernels using NVIDIA Shield controllers under memory pressure, causing operational downtime; low urgency given age and minimal exploit likelihood.

How an attack unfolds

An attacker connects an NVIDIA Shield device to trigger LED initialization in the HID driver; under low-memory conditions the unchecked allocation fails and subsequent dereference corrupts memory or panics the kernel.

How to fix it

Update Linux kernel to a version containing commit 83527a13740f57b45f162e3af4c7db4b88521100 or later stable releases that add the missing null checks in drivers/hid/nvidia-shield.c.

How to confirm the fix worked

Inspect kernel source for null checks immediately after devm_kasprintf calls in nvidia-shield LED init functions; verify running kernel version includes the referenced commit or equivalent patch.

Typical attack path

1. Attach NVIDIA Shield HID device to Linux system
2. Force memory pressure to cause devm_kasprintf failure
3. Trigger driver LED setup code path
4. Induce NULL dereference for crash or corruption

How to detect it

Review kernel logs for oops or panic entries referencing nvidia-shield LED initialization or devm_kasprintf failures; no widespread exploitation artifacts reported.

What your security team should do

• Prioritize kernel upgrade on systems exposing NVIDIA Shield devices
• Monitor for kernel oops/panic logs related to nvidia-shield
• Apply the fix across all affected stable branches