Full Report
Microsoft has shared a temporary fix for ongoing gaming issues caused by Windows 11 updates released during the August 2026 Patch Tuesday. [...]
Analysis Summary
# Vulnerability: Windows Kernel Driver Conflict with RGB Components (August 2026)
## CVE Details
- **CVE ID**: N/A (Currently classified as a "Known Issue" / Stability Bug rather than a security vulnerability)
- **CVSS Score**: N/A
- **CWE**: CWE-439 (Behavioral Change in Software Entities) / CWE-1284 (Improper Validation of Specified Quantity in Input) - *Note: Based on reported "EXCEPTION_ACCESS_VIOLATION" symptoms.*
## Affected Systems
- **Products**: Microsoft Windows 11; Various RGB lighting peripherals and internal components.
- **Versions**: Windows 11 24H2 and 25H2 (specifically following updates KB5121003 released August 11, 2026).
- **Configurations**: Systems equipped with RGB lighting devices that utilize the `inpoutx64.sys` driver or similar code components.
## Vulnerability Description
Technical analysis indicates a compatibility conflict between the Windows kernel and third-party drivers (specifically `inpoutx64.sys`) used for RGB lighting control. Changes made to the Windows kernel in the August 2026 Patch Tuesday updates interact negatively with these drivers when certain gaming applications are launched. This results in memory access violations (`EXCEPTION_ACCESS_VIOLATION`), application crashes, system freezes, and unexpected reboots.
## Exploitation
- **Status**: Not exploited (This is a functional stability issue, not a security flaw).
- **Complexity**: N/A
- **Attack Vector**: Local (Triggered by software interaction).
## Impact
- **Confidentiality**: None
- **Integrity**: None
- **Availability**: **High** (Causes system instability, crashes, and denial of service for gaming applications).
## Remediation
### Patches
- **Official Patch**: Currently unavailable. Microsoft and Embark Studios are investigating a permanent fix.
- **Affected Update**: KB5121003 (and subsequent cumulative updates).
### Workarounds
Microsoft recommends manually disabling the `inpoutx64` driver via the Registry Editor:
1. Open `regedit.exe`.
2. Navigate to: `HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\inpoutx64`
3. Locate the **Start** value and change it to **4** (Disabled).
4. Restart the system.
*Warning: This will likely disable RGB lighting functionality or control software.*
## Detection
- **Indicators of Compromise**: N/A (Functional bug).
- **Symptoms**:
- Presence of `inpoutx64.sys` in system driver directories.
- Application logs showing `EXCEPTION_ACCESS_VIOLATION`.
- System crashes (BSOD) or freezes specifically when launching games like *ARC Raiders*, *MARVEL Tōkon: Fighting Souls*, or *The Finals*.
## References
- **Microsoft Release Health**: hxxps[://]learn[.]microsoft[.]com/en-us/windows/release-health/status-windows-11-24h2
- **Vendor Advisory**: hxxps[://]www[.]bleepingcomputer[.]com/news/microsoft/microsoft-shares-temporary-fix-for-windows-11-gaming-issues/
- **Registry Backup Instructions**: hxxps[://]support[.]microsoft[.]com/topic/how-to-back-up-and-restore-the-registry-in-windows-855140ad-e318-2a13-2829-d428a2ab0692