CVE-2026-20727: Intel PROSet/Wireless WiFi DoS Vulnerability

CVE-2026-20727 Overview

CVE-2026-20727 is a null pointer dereference vulnerability [CWE-476] in Intel(R) PROSet/Wireless WiFi Software for Windows. The flaw resides within Ring 0 (kernel) code, where a missing null check allows an unauthenticated adjacent attacker to trigger a denial of service. Exploitation requires no privileges, no user interaction, and low attack complexity. The condition affects system availability but does not impact confidentiality or integrity. Intel disclosed the issue in security advisory SA-01468.

Critical Impact
An adjacent-network attacker can crash the Windows kernel by triggering a null pointer dereference in the Intel PROSet/Wireless driver, forcing a system-wide denial of service.

Affected Products

Intel(R) PROSet/Wireless WiFi Software for Windows
Windows systems running affected Intel wireless driver versions
Refer to Intel Security Advisory SA-01468 for the complete list of affected versions

Discovery Timeline

2026-08-11 - CVE-2026-20727 published to NVD
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2026-20727

Vulnerability Analysis

CVE-2026-20727 is a kernel-mode null pointer dereference in the Intel PROSet/Wireless WiFi Software for Windows. When the driver processes certain wireless frames or control paths, it operates on a pointer that has not been validated against NULL. Dereferencing that pointer inside Ring 0 causes an immediate access violation in kernel memory, which Windows resolves with a bug check (blue screen of death).

Because the fault occurs in kernel context, recovery requires a full system restart. The impact is limited to availability: the vulnerability does not expose memory contents or allow modification of system state. However, repeatable crashes can be triggered remotely over the wireless medium without credentials.

Root Cause

The root cause is a missing null check on a pointer used within the Intel wireless driver's kernel path. Under specific input conditions reachable from an adjacent wireless attacker, the driver dereferences the uninitialized or freed pointer. This class of defect is tracked as CWE-476 (NULL Pointer Dereference) and is a common source of kernel-mode denial-of-service bugs in network drivers.

Attack Vector

Exploitation requires wireless radio proximity to the target. The attacker must be within range of the victim's wireless adapter, but does not need to authenticate to any network or interact with the user. Crafted wireless frames are sufficient to reach the vulnerable code path.

No public proof-of-concept code has been released. Intel's advisory does not describe the specific frame structure that triggers the fault. Readers should consult Intel Security Advisory SA-01468 for vendor-supplied technical details.

Detection Methods for CVE-2026-20727

Indicators of Compromise

Unexpected Windows bug checks (BSOD) referencing the Intel PROSet/Wireless driver binary in the crash dump stack trace
Repeated kernel crashes on systems within wireless range of an unknown transmitter
WHEA-Logger and BugCheck events in the Windows System event log correlated with wireless activity

Detection Strategies

Collect and parse minidump files from %SystemRoot%\Minidump to identify crashes attributed to the Intel wireless driver module
Monitor Windows Event Log IDs 1001 (BugCheck) and 41 (Kernel-Power) across managed endpoints for clustered crash patterns
Correlate crash timing with wireless connectivity events to distinguish driver bugs from targeted DoS activity

Monitoring Recommendations

Aggregate endpoint crash telemetry centrally to surface anomalous BSOD spikes tied to a specific driver version
Track Intel PROSet/Wireless driver versions across the fleet to identify unpatched hosts
Alert on repeated wireless disconnect and kernel fault events from the same host within short windows

How to Mitigate CVE-2026-20727

Immediate Actions Required

Apply the updated Intel PROSet/Wireless WiFi Software version referenced in Intel Security Advisory SA-01468
Inventory Windows endpoints with Intel wireless adapters and prioritize laptops and mobile users operating in untrusted environments
Restrict use of affected systems in high-density public wireless environments until patched

Patch Information

Intel has published fixed driver versions through Intel Security Advisory SA-01468. Administrators should deploy the updated driver package via standard software distribution mechanisms such as Microsoft Intune, SCCM, or Intel's Driver & Support Assistant. Verify the installed driver version after deployment to confirm remediation.

Workarounds

Disable the Intel wireless adapter on systems that can operate on wired Ethernet until the patch is applied
Limit wireless use to controlled environments where adjacent adversaries cannot reach the device
Enforce automatic driver update policies through Windows Update for Business to accelerate rollout

bash

# Query the installed Intel wireless driver version on Windows
Get-WmiObject Win32_PnPSignedDriver | Where-Object { $_.DeviceName -like "*Intel*Wireless*" } | Select-Object DeviceName, DriverVersion, DriverDate