CVE-2026-47549 in GeForce
Summary
by MITRE • 09/30/2026
NVIDIA GPU Display Driver for Linux contains a vulnerability in the kernel module where an unprivileged local user could cause a NULL pointer dereference. A successful exploit of this vulnerability might lead to denial of service.
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Analysis
by VulDB Data Team • 09/30/2026
The NVIDIA GPU display driver for Linux, specifically within its kernel module component, has been identified as containing a critical software flaw that allows for unauthorized system disruption. This vulnerability stems from improper handling of memory pointers during specific operations executed by the graphics processing unit subsystem. The core technical issue involves a scenario where the code attempts to access or dereference a pointer variable without first verifying whether it holds a valid address in memory. In C-based systems like Linux kernel modules, failing to check for null values before accessing data pointed to by that variable results in a NULL pointer dereference error. This is a classic example of CWE-476, which describes the improper handling of a NULL pointer reference, often leading to unpredictable behavior or system crashes when the program attempts to read from or write to memory address zero.
The security implications of this flaw are significant for local users who do not possess administrative privileges. Because the vulnerability resides in the kernel module, it operates at the highest level of privilege within the operating system architecture. An unprivileged local user can trigger this condition by invoking specific API calls or interacting with GPU resources in a manner that causes the driver to generate an invalid pointer state. Since the exploit requires only local access and no elevated privileges, it represents a straightforward path for any authenticated user on the machine to impact system stability. This aligns with MITRE ATT&CK technique T1059, which covers command and script interpretation, as well as T1499, endpoint denial of service, where an attacker leverages software flaws to degrade or halt computing resources.
The operational impact of a successful exploit is primarily centered on system availability rather than confidentiality or integrity. When the NULL pointer dereference occurs within the kernel space, it typically triggers a panic condition in the Linux operating system. This results in an immediate and uncontrolled termination of processes, often leading to a complete system crash requiring a hard reboot. For environments relying on continuous GPU acceleration for rendering, machine learning training, or scientific computing, such interruptions can cause substantial downtime and data loss if unsaved work is involved. The attacker does not gain control over the system but effectively denies service to all other users and processes running on that host, making this a potent tool for malicious insiders seeking to disrupt operations without leaving traces of privilege escalation.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. NVIDIA has released updated versions of the GPU display driver that include code changes to validate pointer states before dereferencing them, thereby preventing the crash condition. System administrators should prioritize applying these patches across all affected Linux distributions immediately. In addition to software updates, organizations can implement defense-in-depth measures such as restricting local user access to GPU devices through strict file permissions or using containerization technologies like Docker with specific device cgroup rules to limit which users can interact directly with the kernel module. Furthermore, enabling Kernel Self-Protection features and monitoring for unusual spikes in system logs related to driver errors can help detect attempted exploitation attempts before they result in a full denial of service event.