CVE-2026-20769

Executive Summary

CVE-2026-20769 is a denial-of-service vulnerability in the Intel(R) NPU (Neural Processing Unit) Driver affecting all versions of the driver. The flaw is an improper conditions check (CWE-754) reachable from Ring 3 (user mode) by any authenticated, unprivileged local user via a low-complexity attack requiring no user interaction and no special internal knowledge. Successful exploitation results in high availability impact and low integrity impact on the vulnerable system; confidentiality is not affected, and no subsequent system-level confidentiality, integrity, or availability impacts are described.

Technical Analysis

The vulnerability resides in the Intel(R) NPU Driver, the software component responsible for brokering access between user-mode applications and the NPU hardware. The NVD description categorizes the root cause as CWE-754 — Improper Check for Unusual or Exceptional Conditions. This weakness class indicates that the driver does not adequately validate or handle unexpected, malformed, or out-of-specification conditions presented to it during normal operation. When a driver fails to account for such exceptional states, the result is typically undefined internal behavior: an unhandled error path, a fault in the driver's processing logic, or an inconsistent hardware/software state that renders the component unavailable.

The attack surface is explicitly local. The description states the flaw is reachable "within Ring 3: User Applications," meaning the vulnerable code path can be triggered by an unprivileged user-mode process. The preconditions are minimal: the attacker must be an authenticated user on the system and must be able to invoke the NPU driver interface. No special internal knowledge of the system is required, the attack complexity is low, and no user interaction is needed — the attack can be executed programmatically without social engineering. This profile is consistent with a direct invocation of the driver's user-facing interface with crafted inputs designed to place the driver into an unexpected state.

From a technical standpoint, the "improper conditions check" implies the driver likely fails to validate one or more invariants — such as buffer state, synchronization state, or device readiness — before proceeding with a request originating from user space. An attacker who can deliberately violate these invariants (for example, by issuing requests in an invalid order, with inconsistent parameters, or while the device is in a transitional state) can force the driver to crash, hang, or enter a persistent error condition. The availability impact is rated high, consistent with a full loss of the NPU device's functionality or a driver fault that also degrades system stability. The low integrity impact suggests the attacker may be able to corrupt driver- or device-level state, though the description explicitly notes there are no subsequent system integrity impacts, indicating the corruption is contained to the driver/NPU subsystem rather than escalating to broader platform compromise.

It must be noted that the public description contains insufficient technical detail to identify specific function names, IOCTL codes, device node paths, or exact malformed-input sequences. Analysts should treat the vulnerability mechanism as a class-level improper condition handling flaw until Intel releases a detailed advisory. No public proof-of-concept or exploit code has been observed, and the EPSS score (0.00143, 4.1% percentile) reflects a currently low likelihood of exploitation in the wild.

Exploitation Scenarios

No public PoC is available; the attack chain below is inferred from the vulnerability class (CWE-754, local improper conditions check) and the constraints stated in the NVD description.

1. Reconnaissance / target identification: The attacker must have a valid local account on a system equipped with an Intel NPU and the affected driver. Target identification is trivial at the host level — the attacker can enumerate installed drivers and NPU device presence through standard OS APIs or by observing the presence of NPU-related driver services. Because the description states no special internal knowledge is required, a non-privileged user can perform this enumeration as part of normal system access.

2. Triggering the flaw: The attacker executes a user-mode program that interacts with the Intel(R) NPU Driver and deliberately submits requests that violate the driver's expected input or state conditions. Because the flaw is an improper conditions check, the trigger mechanism is at the class level: presenting the driver with an unusual sequence of operations, an invalid parameter combination, or a request issued during a device state in which it is not valid to process it. The low complexity rating indicates the trigger does not require precise reverse engineering of the driver — simple malformed or exceptional-condition requests may suffice.

3. Payload / execution method: At the class level, the "payload" is a custom-compiled Ring 3 application that repeatedly or specifically invokes the NPU driver interface. No privileged code execution is required; the application runs with normal user privileges. The attack requires no user interaction, so the malicious process can run autonomously once launched, potentially via scripts, scheduled tasks, or other unprivileged execution paths.

4. Post-exploitation impact: A successful trigger causes the driver to fail its conditions handling, resulting in a denial of service. The probable observable outcome is a driver crash or hang — for example, the NPU device becoming unresponsive, associated driver service terminating, or error events being written to the system event log. The NVD description limits the impact to availability (high) and integrity (low) of the vulnerable system, with no subsequent confidentiality, integrity, or availability impacts at the system level. This indicates the attacker achieves a localized denial-of-service against the NPU subsystem rather than privilege escalation, data exfiltration, or platform-wide compromise.

Impact Assessment

Business impact: The primary impact is denial of service against workloads that depend on the Intel NPU, which in modern Intel platforms accelerates AI/ML inference and adjacent compute tasks. A successful exploit can render the NPU unavailable, disrupting inference pipelines, AI-assisted features, and any user-mode application that relies on NPU acceleration. The low integrity impact suggests the driver state may be corrupted in the process, potentially requiring a driver reload or system reboot to restore functionality.

Affected systems: Intel platforms with NPU hardware and the vulnerable driver installed. The description states "all versions" of the Intel(R) NPU Driver are affected, which broadens the exposure across product generations. Since the attack requires only local authenticated access, any multi-user system, shared workstation, VDI session host, or lab environment with Intel NPU hardware is in scope.

Blast radius: The attack is local — it cannot be exploited remotely over the network. The blast radius is therefore confined to the individual host on which the attacker holds an account. The availability impact is high for the NPU subsystem, but the explicitly stated absence of subsequent system impacts means the DoS does not cascade into broader platform compromise or cross-system propagation. The CISA KEV catalog does not list this CVE, and no exploit-in-the-wild activity has been reported; the EPSS score of 0.00143 (4.1% percentile) confirms a low current likelihood of exploitation.

Detection Guidance

The following detections are host-centric because CVE-2026-20769 is a local-access vulnerability with no expected network-observable pre-exploitation signal. Network-based rules are provided for completeness but should be considered supplementary; primary detection should occur at the endpoint via event logs and endpoint agents. Detection logic focuses on the observable aftermath of an improper conditions check: driver crashes, abnormal service terminations, and Windows Error Reporting (WER) events referencing the Intel NPU driver.

Sigma Rule

title: Intel NPU Driver Denial of Service - Crash and Service Termination Indicators
id: 60ff8a10-2a3e-4d9c-9ff4-c9c0d3b1a7d2
status: experimental
description: Detects Windows Error Reporting and Service Control Manager events indicative of Intel(R) NPU driver instability associated with CVE-2026-20769 local denial-of-service attempts.
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-20769
author: valtersit.com Threat Intelligence
date: 2026/06/03
logsource:
    product: windows
    service: system
detection:
    selection_wer:
        EventID: 1001
        Provider_Name: 'Windows Error Reporting'
        Message|contains|all:
            - 'Intel'
            - 'NPU'
    selection_scm_service:
        EventID:
            - 7031
            - 7034
        Message|contains|all:
            - 'Intel'
            - 'NPU'
    selection_pshutdown:
        EventID: 6008
        Message|contains: 'previous shutdown'
    condition: selection_wer or selection_scm_service
    timeframe: 15m
level: medium
falsepositives:
    - Legitimate driver updates causing a brief service restart
    - Hardware instability or power failure unrelated to the vulnerability
    - Third-party software triggering generic WER entries

YARA Rule

/*
    YARA rule for CVE-2026-20769 detection support.
    Targets unprivileged Windows executables that reference the
    Intel(R) NPU Driver attack surface - a precursor to triggering
    the improper conditions check. Host-based file/memory scan.
*/
rule CVE_2026_20769_Intel_NPU_DoS_Payload
{
    meta:
        author = "valtersit.com Threat Intelligence"
        description = "Flags user-mode PE binaries referencing the Intel(R) NPU Driver, consistent with a local CVE-2026-20769 denial-of-service trigger"
        cve = "CVE-2026-20769"
        date = "2026-06-03"
        severity = "medium"
    strings:
        $s1 = "Intel(R) NPU Driver" ascii wide nocase
        $s2 = "NPU" ascii wide nocase
    condition:
        uint16(0) == 0x5A4D and          // MZ header - PE binary
        $s1 and
        $s2 and
        filesize < 5MB
}

Suricata IDS Rule

Network-layer detection of this local vulnerability is inherently limited; exploitation occurs entirely on the host. The rule below covers a realistic pre-exploitation network stage: delivery of a crafted NPU-DoS tool to the target host over HTTP.

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"CVE-2026-20769 Intel NPU Driver Local DoS - Potential Payload Download"; flow:to_client,established; content:"npu"; http.uri; nocase; content:".exe"; http.uri; nocase; distance:0; within:20; classtype:attempted-dos; reference:cve,2026-20769; reference:url,https://nvd.nist.gov/vuln/detail/CVE-2026-20769; sid:2026207691; rev:1;)

Operators should treat this rule as an indicator of the delivery chain, not of exploitation itself. Primary coverage for CVE-2026-20769 must come from host-based detection rules (Sigma, Elastic, Splunk, Wazuh) that monitor driver crash and service termination events.

Elastic Detection

sequence by host.name with maxspan=10m
  [ any where event.code == "7031" and message like "*Intel*" and message like "*NPU*" ]
  [ any where event.code == "7034" and message like "*Intel*" and message like "*NPU*" ]
  [ any where event.code == "1001" and message like "*NPU*" ]

This EQL sequence correlates Service Control Manager events (service terminated unexpectedly) with subsequent Windows Error Reporting records naming the NPU component, providing a strong signal of repeated driver fault conditions consistent with a DoS trigger loop.

Splunk SPL Query

index=windows sourcetype=WinEventLog:System
    (EventCode=7031 OR EventCode=7034 OR EventCode=1001)
    Message="*Intel*NPU*"
| eval attack_indicator=if(match(Message,"(?i)intel.*npu|npu.*intel"),"CVE-2026-20769 candidate","other")
| stats count min(_time) as first_seen max(_time) as last_seen by host, EventCode, attack_indicator
| where attack_indicator="CVE-2026-20769 candidate" AND count >= 3
| sort - count

The query detects clusters of NPU driver fault events, filtering for hosts with three or more occurrences — a repeat pattern more consistent with an intentional malicious trigger than an isolated driver glitch.

Wazuh OSSEC Rule

<group name="windows,system_error,cve_2026_20769,">
    <rule id="100269" level="10">
        <if_sid>600</if_sid>
        <field name="win.system.channel">System</field>
        <field name="win.system.eventID">7031|7034</field>
        <match>Intel</match>
        <description>CVE-2026-20769: Intel(R) NPU driver service terminated unexpectedly - possible local denial-of-service attempt</description>
        <group>windows,system_error,cve_2026_20769,</group>
    </rule>

    <rule id="100270" level="8">
        <if_sid>600</if_sid>
        <field name="win.system.channel">Application</field>
        <field name="win.system.eventID">1001</field>
        <match>NPU</match>
        <description>CVE-2026-20769: Windows Error Reporting event referencing Intel NPU driver - possible driver fault after conditions-check failure</description>
        <group>windows,cve_2026_20769,</group>
    </rule>
</group>

Mitigation & Patch Guidance

Patch confidence is 0/4 — UNPATCHED. No patch evidence exists from any tracked source, no vendor fix has been released, and no workarounds have been published by Intel. Until an updated driver is available, organizations must rely on compensating controls.

1. Immediate mitigations:

   • Restrict local interactive access to systems with Intel NPU hardware. Enforce least-privilege account policies and disable or audit shared/low-trust local accounts, since the vulnerability requires only an authenticated unprivileged user.
   • Apply application allowlisting (e.g., Microsoft WDAC, AppLocker) to prevent unknown or unsigned user-mode binaries from executing, which would block the delivery of a crafted NPU-driver trigger program.
   • Monitor NPU driver health. Deploy the Sigma/Elastic/Splunk/Wazuh rules above to alert on repeated NPU driver crash events (Event IDs 7031, 7034, 1001) and treat clusters of such events as a suspected DoS attempt.
   • If NPU acceleration is not business-critical, consider disabling the NPU device or its driver service via BIOS/device manager in high-risk or multi-tenant environments until a patch is available.

2. Patch/upgrade steps:

   • No patch is currently available. Subscribe to Intel's security advisory feed (Intel Security Center) and track CVE-2026-20769 for the release of an updated Intel(R) NPU Driver.
   • When a patched driver is released, stage and test it in a non-production environment, then deploy through standard software update or OSV-based patching channels. Validate driver version against Intel's advisory before broad rollout.

3. Long-term hardening:

   • Adopt driver update management processes so NPU firmware/driver updates are evaluated and deployed promptly across the fleet.
   • Enable and tune endpoint detection and response (EDR) telemetry for driver fault events and abnormal user-mode interaction with the NPU interface.
   • For development teams: apply secure driver development guidance, including comprehensive input validation and exceptional-condition handling, to prevent recurrence of CWE-754 class flaws in future driver versions.
   • Reassess exposure after patching; the low EPSS score (0.00143) and absence from CISA KEV reduce exploitation urgency, but the unpatched status justifies sustained monitoring until a fix ships.

References

1. NVD — CVE-2026-20769: https://nvd.nist.gov/vuln/detail/CVE-2026-20769
2. Intel Security Center (vendor advisory page — monitor for future firmware/driver updates): https://www.intel.com/content/www/us/en/security-center/default.html
3. MITRE CWE-754 — Improper Check for Unusual or Exceptional Conditions: https://cwe.mitre.org/data/definitions/754.html
4. MITRE ATT&CK — T1499 Endpoint Denial of Service: https://attack.mitre.org/techniques/T1499/
5. CISA Known Exploited Vulnerabilities Catalog (CVE-2026-20769 is NOT currently listed): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Threat actor / in-the-wild evidence: None reported. No public exploit code, no Nuclei template, and no CISA KEV entry exist for this CVE as of this report. The EPSS score of 0.00143 (4.1% percentile) indicates a low probability of active exploitation in the near term; however, the unpatched status of all driver versions warrants continued defensive monitoring.