CVE-2026-20754: Intel NPU Drivers DoS Vulnerability

CVE-2026-20754 Overview

CVE-2026-20754 is a firmware vulnerability affecting certain Intel Neural Processing Unit (NPU) drivers operating within Ring 1: Device Drivers. The flaw stems from an improper conditions check [CWE-754] in the driver firmware. An authenticated local user with low privileges can trigger the condition to cause a denial of service on the affected system. The vulnerability does not require user interaction and carries low attack complexity. Exploitation impacts system availability while having no effect on confidentiality and only limited impact on integrity. Intel published advisory SA-01424 to address the issue.

Critical Impact

Local authenticated attackers can cause a denial of service against systems running affected Intel NPU driver firmware, disrupting availability of the device and dependent workloads.

Affected Products

• Intel NPU Drivers (firmware components within Ring 1: Device Drivers)
• Specific affected versions are enumerated in Intel Security Advisory SA-01424

Discovery Timeline

• 2026-05-12 - CVE-2026-20754 published to NVD
• 2026-05-13 - Last updated in NVD database

Technical Details for CVE-2026-20754

Vulnerability Analysis

The vulnerability is classified under [CWE-754]: Improper Check for Unusual or Exceptional Conditions. The affected firmware in Intel NPU drivers fails to properly validate certain conditions before acting on them. When an unprivileged but authenticated process interacts with the driver in a specific way, the missing check allows the device to enter a fault state. This produces a denial of service against the NPU hardware path and any workloads dependent on it.

The defect resides in Ring 1: Device Drivers, meaning it executes in a privileged firmware/driver layer below the operating system kernel boundaries that typically isolate user workloads. Successful exploitation does not yield code execution or data disclosure. The impact is constrained to low integrity effects and high availability impact, per the published metrics.

Root Cause

The root cause is an improper conditions check within Intel NPU driver firmware. The firmware does not adequately verify the state or input conditions returned during driver-level operations. As a result, an unexpected condition is not handled safely, leading to a fault that disrupts the NPU. Refer to Intel Security Advisory SA-01424 for vendor-specified technical details.

Attack Vector

The attack vector is local. An adversary requires an authenticated account with low privileges on the target system. No user interaction is needed and attack complexity is low. The attacker invokes driver functionality from user space in a manner that exercises the unchecked condition. The result is loss of availability for the NPU subsystem. No public proof-of-concept or in-the-wild exploitation has been reported, and EPSS data places the probability of exploitation in the low range.

No verified exploit code is publicly available. Refer to the Intel advisory for any vendor-supplied technical guidance.

Detection Methods for CVE-2026-20754

Indicators of Compromise

• Repeated NPU driver fault events, crashes, or reset entries in operating system logs
• Abnormal termination or hangs of AI/ML workloads scheduled on the NPU
• Unexpected device reinitialization events for the Intel NPU device path
• Kernel or driver-level event log entries originating from the Intel NPU driver around the time of workload failures

Detection Strategies

• Monitor Windows Event Log and Linux dmesg / journalctl output for Intel NPU driver error signatures and reset events
• Correlate NPU driver faults with the parent process and user account that initiated the triggering workload
• Establish a baseline for normal NPU device utilization and alert on anomalous fault rates from non-administrative users
• Track firmware and driver version inventory to identify endpoints still running pre-patch Intel NPU driver builds

Monitoring Recommendations

• Forward endpoint device and driver telemetry into a centralized analytics platform for cross-host correlation
• Alert on patterns of low-privileged users repeatedly invoking NPU device interfaces followed by driver errors
• Track availability metrics for NPU-dependent services to surface denial of service conditions quickly

How to Mitigate CVE-2026-20754

Immediate Actions Required

• Inventory all systems with Intel NPU hardware and identify the currently installed NPU driver and firmware versions
• Apply the firmware and driver updates referenced in Intel Security Advisory SA-01424 as soon as they are validated for your environment
• Restrict local interactive and remote authenticated access to systems hosting sensitive NPU workloads to trusted users only
• Review endpoint hardening to limit which low-privileged accounts can invoke device driver interfaces

Patch Information

Intel has published advisory SA-01424 covering CVE-2026-20754. Administrators should consult Intel Security Advisory SA-01424 for the list of affected driver versions and the fixed firmware/driver releases. Apply the updates through standard OEM or Intel driver distribution channels.

Workarounds

• Where patching is delayed, limit local logon rights on affected hosts to reduce the population of accounts that can trigger the condition
• Disable or unload the Intel NPU driver on systems that do not require NPU acceleration until updates are applied
• Monitor and rate-limit unprivileged access to NPU device interfaces through host-based controls

# Example: verify Intel NPU driver version on Linux
lsmod | grep -i npu
modinfo intel_vpu 2>/dev/null | grep -E '^(version|filename):'
dmesg | grep -i -E 'intel.*(npu|vpu)'