CVE-2026-47596 in GeForce
Summary
by MITRE • 09/30/2026
NVIDIA GPU Display Driver for Linux contains a vulnerability in the kernel mode layer where an unprivileged user can write to read-only memory because the memory's permissions are not preserved. A successful exploit of this vulnerability might lead to code execution and escalation of privileges.
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Analysis
by VulDB Data Team • 09/30/2026
The NVIDIA GPU display driver for Linux presents a critical security flaw within its kernel-mode component, specifically involving improper handling of memory access controls during graphics processing operations. This vulnerability stems from a failure in the operating system's mandatory access control mechanisms when interacting with hardware-specific drivers. In a properly secured environment, memory regions designated as read-only by the kernel should remain immutable to all processes except those with explicit administrative privileges or specific driver-level permissions that are carefully audited and restricted. However, due to this implementation error, the driver fails to enforce these restrictions consistently across different execution contexts, allowing an unprivileged user-space process to bypass standard permission checks and write directly into memory segments intended to be read-only.
From a technical perspective, this issue represents a classic violation of memory integrity principles where the boundary between user space and kernel space is not sufficiently hardened against malicious manipulation. The vulnerability likely arises from insufficient validation of buffer ownership or incorrect mapping of physical memory pages during device initialization or runtime graphics operations. When an application requests access to GPU memory buffers, the driver may inadvertently map these regions with write permissions even when they are logically designated as read-only for security reasons. This discrepancy allows attackers to inject arbitrary data into kernel structures that control hardware behavior, interrupt handlers, or other critical system components without requiring root privileges initially.
The operational impact of this flaw is severe, primarily because it facilitates privilege escalation from a standard user account to the highest level of system authority. An attacker who successfully exploits this vulnerability can execute arbitrary code within the context of the kernel, which runs with unrestricted access to all hardware and software resources on the host machine. This capability effectively neutralizes most security boundaries implemented by modern operating systems, including Linux Security Modules such as SELinux or AppArmor, since those modules operate at a higher level than direct memory manipulation in kernel space. Consequently, an attacker could install backdoors, exfiltrate sensitive data from protected storage, disable logging mechanisms to cover their tracks, or pivot further into connected networks if the compromised system serves as a gateway.
This vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-269, which describes Improper Privilege Management, and more specifically relates to CWE-787, Out-of-bounds Write, when considering how data is placed into restricted memory regions. In the context of the MITRE ATT&CK framework, this exploit path corresponds to techniques under Tactic TA0004: Privilege Escalation, particularly aligning with technique T1068 Exploitation for Privilege Escalation and potentially T1055 Process Injection if the attacker leverages kernel memory manipulation to inject code into legitimate system processes. The ability to write to read-only memory is a foundational step in many advanced persistent threat campaigns that aim to establish long-term access with elevated permissions while evading detection by standard endpoint protection solutions.
Mitigation strategies must focus on both immediate patching and longer-term architectural improvements within the driver development lifecycle. NVIDIA has released updated versions of the GPU display drivers for Linux that address this specific permission handling flaw, ensuring that memory mappings strictly adhere to their intended access controls regardless of the calling process's privilege level. System administrators should prioritize applying these updates across all affected systems immediately to close the attack vector before it can be weaponized by threat actors who may already have knowledge of this weakness in exploit kits or zero-day markets. Additionally, organizations should enforce strict kernel module signing policies and enable Secure Boot features where applicable to prevent unauthorized modifications to driver binaries from being loaded into memory.
Beyond patching, defense-in-depth measures are recommended to reduce the blast radius if a similar vulnerability is discovered in future updates. Implementing mandatory access control profiles that restrict what actions unprivileged users can perform with GPU devices can limit opportunities for exploitation even before patches are applied. Monitoring tools should be configured to detect anomalous behavior associated with kernel memory writes, such as unexpected changes in system call patterns or unusual activity from processes attempting to interact directly with hardware interfaces without proper authorization tokens. Regular audits of driver code against secure coding standards like CERT C and MISRA guidelines can also help identify similar logic errors before they reach production environments, ensuring that future iterations maintain robust separation between user-space applications and kernel-mode resources.