CVE-2026-24194: NVIDIA Linux Driver Privilege Escalation

CVE-2026-24194 Overview

CVE-2026-24194 affects the NVIDIA Display Driver for Linux. The vulnerability resides in a kernel mode layer handler that performs improper permission handling [CWE-281]. A local user with low privileges can trigger the flaw without user interaction.

Successful exploitation can lead to denial of service, privilege escalation, information disclosure, data tampering, and arbitrary code execution. Because the vulnerable component runs in kernel context, successful exploitation grants the attacker elevated control over the affected host. NVIDIA published an advisory addressing the issue. See the NVIDIA Support Response and the NVD CVE-2026-24194 Details for vendor-supplied information.

Critical Impact

A local, low-privileged user can escalate to kernel-level execution on Linux systems running affected NVIDIA Display Drivers, enabling full system compromise.

Affected Products

• NVIDIA Display Driver for Linux (kernel mode layer)
• Specific affected versions: refer to the NVIDIA Support Response for the authoritative version matrix
• Linux distributions deploying the affected NVIDIA proprietary kernel modules

Discovery Timeline

• 2026-05-26 - CVE-2026-24194 published to NVD
• 2026-05-26 - Last updated in NVD database

Technical Details for CVE-2026-24194

Vulnerability Analysis

The flaw is classified under [CWE-281] Improper Preservation of Permissions. A kernel mode layer handler in the NVIDIA Display Driver for Linux fails to correctly preserve or enforce permissions on a privileged operation or resource. When a local user issues a crafted request through the driver interface, the handler processes the operation without the permission constraints that should apply to an unprivileged caller.

The impact set spans confidentiality, integrity, and availability. Because the vulnerable code path executes in kernel mode, an attacker who controls the inputs can manipulate kernel state, read protected memory, corrupt structures the kernel relies upon, or redirect execution. The vendor confirms outcomes ranging from denial of service to code execution, indicating the permission flaw is reachable from contexts that should not have kernel-equivalent authority.

Root Cause

The root cause is improper permission handling within a kernel mode layer handler. The driver does not enforce the access control checks required before executing or exposing a privileged operation. As a result, an attacker bypasses the boundary between user-mode callers and kernel-mode functionality that NVIDIA's driver should maintain.

Attack Vector

Exploitation requires local access and low privileges. No user interaction is necessary. An attacker first obtains an unprivileged shell or code execution context on the target Linux host, then interacts with the NVIDIA driver interfaces, typically the device nodes exposed by the kernel module, to invoke the vulnerable handler. No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Verified exploit code is not available; refer to the vendor advisory for technical detail.

Detection Methods for CVE-2026-24194

Indicators of Compromise

• Unexpected loading or reloading of NVIDIA kernel modules (nvidia, nvidia_drm, nvidia_modeset, nvidia_uvm) under non-administrative user sessions
• Anomalous ioctl activity from unprivileged processes targeting /dev/nvidia* device nodes
• Kernel ring buffer (dmesg) entries showing oops, panics, or warnings originating from NVIDIA driver symbols
• New SUID binaries, unauthorized root processes, or privilege transitions immediately following NVIDIA driver interaction

Detection Strategies

• Monitor process lineage and capability changes that occur shortly after access to NVIDIA device files
• Alert on Linux audit (auditd) events covering open, ioctl, and mmap syscalls against /dev/nvidia* from low-privilege users
• Correlate kernel error events with subsequent privilege escalations or unexpected loading of additional kernel modules

Monitoring Recommendations

• Centralize Linux kernel logs and audit trails for retrospective hunting on driver-targeted activity
• Track installed NVIDIA driver versions across the fleet and flag hosts running versions not yet patched per the NVIDIA advisory
• Baseline normal GPU workload users and investigate access to NVIDIA device nodes by accounts outside that baseline

How to Mitigate CVE-2026-24194

Immediate Actions Required

• Apply the patched NVIDIA Display Driver for Linux as specified in the NVIDIA Support Response
• Inventory all Linux systems running NVIDIA proprietary drivers, including workstations, GPU compute nodes, and virtualization hosts
• Restrict interactive and remote local access on GPU-equipped Linux systems until patching is complete

Patch Information

NVIDIA has released updated Linux Display Driver packages that address the improper permission handling in the affected kernel mode layer handler. Administrators should consult the NVIDIA Support Response for the authoritative list of affected branches and the corresponding fixed versions, then deploy through the distribution package manager or NVIDIA's installer. Reboot is typically required to load the updated kernel modules.

Workarounds

• Limit access to /dev/nvidia* device nodes through group ownership and permission tightening where workloads permit
• Remove or unload NVIDIA kernel modules (nvidia, nvidia_drm, nvidia_modeset, nvidia_uvm) on systems that do not require GPU functionality
• Enforce least privilege on Linux endpoints and prevent untrusted local code execution as a compensating control until patches are deployed

# Identify installed NVIDIA driver version and loaded kernel modules
nvidia-smi --query-gpu=driver_version --format=csv,noheader
lsmod | grep -E '^nvidia'

# Audit ioctl activity against NVIDIA device nodes (requires auditd)
auditctl -w /dev/nvidia0 -p rwa -k nvidia_driver_access
auditctl -w /dev/nvidiactl -p rwa -k nvidia_driver_access

# Unload NVIDIA modules on systems that do not require GPU acceleration
sudo rmmod nvidia_uvm nvidia_drm nvidia_modeset nvidia