CVE-2026-0106: VPU IOCTL Privilege Escalation Vulnerability

CVE-2026-0106 Overview

CVE-2026-0106 is a critical vulnerability affecting the Android VPU (Video Processing Unit) driver. The flaw exists in the vpu_mmap function within vpu_ioctl, where a missing bounds check allows for arbitrary address memory mapping. This vulnerability enables local privilege escalation without requiring any user interaction or additional execution privileges.

Critical Impact

This vulnerability allows attackers to achieve local privilege escalation through arbitrary memory mapping, potentially gaining complete control over affected Android devices without user interaction.

Affected Products

• Android devices with VPU driver (Pixel devices)
• Devices running affected Android security patch levels prior to February 2026

Discovery Timeline

• February 5, 2026 - CVE-2026-0106 published to NVD
• February 5, 2026 - Last updated in NVD database

Technical Details for CVE-2026-0106

Vulnerability Analysis

This vulnerability falls under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). The flaw resides in the kernel-level VPU driver, specifically within the vpu_mmap handler that processes memory mapping requests from user-space applications.

The vulnerability allows an unprivileged local process to map arbitrary physical memory addresses into its virtual address space. Because the driver fails to validate the requested memory range against permitted boundaries, an attacker can map kernel memory regions, hardware registers, or other sensitive memory areas that should be inaccessible to user-space applications.

The local attack vector means an attacker must have some form of code execution on the device—such as through a malicious application—but no special privileges or user interaction are required to trigger the vulnerability. The scope change indicator suggests that successful exploitation can affect resources beyond the vulnerable component, impacting the entire system's confidentiality, integrity, and availability.

Root Cause

The root cause is a missing bounds check in the vpu_mmap function. When processing mmap requests through the VPU ioctl interface, the driver accepts user-supplied offset and size parameters without properly validating that the resulting memory region falls within the legitimate bounds of VPU-related memory. This allows attackers to specify arbitrary physical addresses for mapping operations.

Attack Vector

The attack exploits the local ioctl interface exposed by the VPU driver. An attacker would:

1. Open the VPU device file to obtain a file descriptor
2. Issue an mmap system call with carefully crafted offset parameters targeting sensitive memory regions
3. Gain read/write access to kernel memory or other privileged address spaces
4. Leverage this access to escalate privileges, such as by modifying kernel data structures or overwriting security credentials

This exploitation technique does not require any user interaction and can be performed silently by a malicious application running with normal user privileges.

Detection Methods for CVE-2026-0106

Indicators of Compromise

• Unusual mmap system calls targeting the VPU device driver from non-media applications
• Unexpected processes accessing /dev/vpu* or similar VPU device files
• Memory access violations or kernel oops messages related to VPU driver operations
• Privilege escalation artifacts such as unexpected root shells or modified system files

Detection Strategies

• Monitor for suspicious ioctl calls to VPU device drivers from untrusted applications
• Implement SELinux/SEAndroid policies that restrict VPU device access to authorized media processes only
• Deploy endpoint detection solutions capable of monitoring kernel driver interactions
• Audit application permissions for unnecessary access to hardware drivers

Monitoring Recommendations

• Enable kernel auditing for device file access, particularly /dev/vpu* device nodes
• Monitor for applications attempting to map large or unusual memory regions through hardware drivers
• Implement behavioral analysis to detect post-exploitation privilege escalation activities
• Review system logs for VPU driver errors or unexpected memory mapping operations

How to Mitigate CVE-2026-0106

Immediate Actions Required

• Apply the Android security patch from the February 2026 security bulletin immediately
• Restrict application installation to trusted sources to reduce exposure to malicious apps
• Review and enforce SELinux policies that limit VPU device access
• Consider disabling VPU functionality if not required and if the patch cannot be immediately applied

Patch Information

Google has addressed this vulnerability in the Android Security Bulletin February 2026. Device manufacturers and users should ensure their devices are updated to the February 2026 security patch level or later. For Pixel devices, over-the-air updates should be available; other Android devices should receive patches according to their manufacturer's update schedule.

Workarounds

• Implement strict SELinux policies to deny VPU device access to untrusted applications
• Use mobile device management (MDM) solutions to restrict application installations
• Consider device isolation for high-value targets until patches can be applied
• Monitor for and block known malicious applications that may attempt exploitation

# Example SELinux policy audit for VPU device access
# Check current SELinux context for VPU devices
ls -Z /dev/vpu* 2>/dev/null || echo "VPU device not found"

# Verify security patch level on Android device
adb shell getprop ro.build.version.security_patch