CVE-2025-32739: Intel Graphics Driver DoS Vulnerability

CVE-2025-32739 Overview

CVE-2025-32739 is an improper conditions check vulnerability affecting firmware in some Intel Graphics Drivers and Intel LTS kernels operating within Ring 1 (Device Drivers). This firmware vulnerability stems from inadequate condition validation that may allow an authenticated attacker with local access to cause a denial of service condition.

Critical Impact

Authenticated local attackers with specialized knowledge can potentially trigger a denial of service condition affecting system availability through improper firmware condition checking in Intel Graphics Drivers.

Affected Products

• Intel Graphics Drivers (various versions with affected firmware)
• Intel LTS Kernels (Long Term Support kernels with vulnerable driver components)
• Systems utilizing affected Ring 1 device driver firmware

Discovery Timeline

• 2026-02-10 - CVE-2025-32739 published to NVD
• 2026-02-10 - Last updated in NVD database

Technical Details for CVE-2025-32739

Vulnerability Analysis

This vulnerability is classified under CWE-754 (Improper Check for Unusual or Exceptional Conditions), indicating that the affected firmware fails to properly validate certain conditions during operation. The flaw exists within Ring 1 device drivers, which operate at a privileged level in the x86 protection ring architecture but below the kernel level (Ring 0).

The vulnerability requires local access to exploit and presents a high attack complexity barrier. An adversary must possess authenticated user credentials and have access to special internal knowledge about the system to successfully trigger the condition. The impact is limited to availability, with no compromise of confidentiality or integrity.

Root Cause

The root cause lies in improper conditions check logic within the firmware code for Intel Graphics Drivers. The firmware fails to adequately validate exceptional or unusual conditions during runtime operations. When specific conditions are not properly checked, the system may enter an unexpected state that leads to denial of service. This type of flaw typically occurs when boundary conditions, error states, or edge cases are not fully accounted for in the firmware logic.

Attack Vector

The attack vector is local, requiring the adversary to have authenticated access to the target system. Successful exploitation demands:

1. Local Access: The attacker must have local access to the vulnerable system
2. Authenticated Session: Valid user credentials are required to interact with the driver
3. High Complexity: The attack requires specific preconditions and timing
4. Special Knowledge: Internal knowledge of the firmware behavior is necessary to trigger the vulnerable condition
5. Attack Requirements Present: Certain environmental conditions must be met

The vulnerability cannot be exploited remotely and does not require user interaction beyond the initial authenticated session. When successfully exploited, the impact is limited to a low availability impact on the local system, with no subsequent impact on system confidentiality, integrity, or availability.

Detection Methods for CVE-2025-32739

Indicators of Compromise

• Unexpected graphics driver crashes or restarts without user-initiated activity
• System event logs showing driver fault conditions in Intel Graphics components
• Unusual patterns of driver reinitialization in Ring 1 device driver operations

Detection Strategies

• Monitor system logs for Intel Graphics Driver error events and unexpected terminations
• Implement endpoint detection rules to identify anomalous driver behavior patterns
• Configure alerts for repeated driver fault conditions that may indicate exploitation attempts
• Track firmware version information to identify systems running vulnerable driver versions

Monitoring Recommendations

• Enable verbose logging for Intel Graphics Driver components where performance impact is acceptable
• Establish baseline driver behavior metrics to detect anomalies
• Integrate driver crash telemetry with SIEM solutions for correlation analysis
• Review system stability reports for patterns consistent with denial of service attempts

How to Mitigate CVE-2025-32739

Immediate Actions Required

• Review the Intel Security Advisory SA-01385 for specific affected product versions and firmware updates
• Inventory systems using Intel Graphics Drivers to identify potentially vulnerable deployments
• Prioritize updates for systems where authenticated users may pose an insider threat risk
• Consider temporary access restrictions for sensitive systems until patches can be applied

Patch Information

Intel has published security guidance in Intel Security Advisory SA-01385. Organizations should consult this advisory for specific firmware updates and patching instructions applicable to their affected Intel Graphics Drivers and LTS kernel deployments.

Workarounds

• Restrict local access to systems with vulnerable Intel Graphics Drivers to trusted users only
• Implement principle of least privilege for user accounts with system access
• Monitor driver behavior closely until firmware updates can be applied
• Consider disabling affected graphics features if operationally feasible as a temporary measure

# Check Intel Graphics Driver version on Linux systems
lspci -k | grep -A 3 "VGA"
# Review driver module information
modinfo i915
# Check system logs for driver issues
journalctl -k | grep -i "i915\|graphics"