CVE-2022-22265: Google Android NPU Driver RCE Vulnerability

CVE-2022-22265 Overview

CVE-2022-22265 is a critical driver vulnerability affecting Samsung devices with Exynos processors running Google Android. The flaw exists in the Neural Processing Unit (NPU) driver, where improper check or handling of exceptional conditions allows attackers to perform arbitrary memory writes and achieve code execution on affected devices. This vulnerability has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild.

Critical Impact

This vulnerability enables local attackers to achieve arbitrary memory write capabilities and execute code on affected Samsung devices, potentially leading to complete device compromise through privilege escalation.

Affected Products

• Google Android 9.0, 10.0, 11.0, and 12.0
• Samsung Exynos processors with NPU functionality
• Samsung mobile devices prior to SMR Jan-2022 Release 1

Discovery Timeline

• 2022-01-10 - CVE-2022-22265 published to NVD
• 2025-10-30 - Last updated in NVD database

Technical Details for CVE-2022-22265

Vulnerability Analysis

CVE-2022-22265 is classified under CWE-703 (Improper Check or Handling of Exceptional Conditions). The vulnerability resides in the NPU (Neural Processing Unit) driver, a kernel-level component responsible for managing AI/ML hardware acceleration on Samsung devices equipped with Exynos chipsets.

The root cause involves the NPU driver's failure to properly validate or handle exceptional conditions during memory operations. When specific edge cases or error conditions occur, the driver does not adequately check input parameters or handle error states, creating an opportunity for memory corruption. This improper exception handling allows an attacker with local access to craft malicious inputs that bypass security checks, resulting in arbitrary memory write capabilities.

The vulnerability requires local access to exploit, meaning an attacker must first gain initial code execution on the device through another vector such as a malicious application or compromised app. Once local access is achieved, the attacker can leverage this NPU driver flaw to write to arbitrary memory locations within the kernel context, enabling privilege escalation from an unprivileged application to kernel-level code execution.

Root Cause

The vulnerability stems from CWE-703: Improper Check or Handling of Exceptional Conditions. The NPU driver code fails to implement adequate boundary checking and exception handling when processing user-supplied data. This allows attackers to manipulate driver operations in ways that were not anticipated by the developers, leading to memory corruption conditions. The lack of proper input validation at the kernel driver level is particularly dangerous as it operates with elevated privileges.

Attack Vector

The attack vector is local, requiring the attacker to have some form of initial access to the target device. This could be achieved through a malicious application installed on the device, a compromised legitimate application, or through another vulnerability that provides initial code execution. Once local access is established, the attacker can interact with the NPU driver through its exposed interfaces, sending crafted requests that trigger the improper exception handling condition. The arbitrary memory write capability can then be leveraged to overwrite critical kernel data structures or inject malicious code, achieving complete system compromise.

The vulnerability mechanism involves sending specially crafted ioctl commands or memory-mapped I/O requests to the NPU driver that trigger error conditions the driver fails to handle securely. For detailed technical analysis, refer to the Samsung Security Update January 2022.

Detection Methods for CVE-2022-22265

Indicators of Compromise

• Unusual processes or applications attempting to access NPU driver interfaces (/dev/npu* device nodes)
• Suspicious ioctl calls to NPU driver with abnormal parameters
• Kernel memory corruption artifacts or unexpected kernel crashes
• Evidence of privilege escalation from unprivileged application contexts

Detection Strategies

• Monitor for anomalous access patterns to NPU driver device nodes at the kernel level
• Implement security monitoring solutions that detect unauthorized privilege escalation attempts
• Deploy mobile device management (MDM) solutions with runtime threat detection capabilities
• Utilize behavioral analysis to detect applications exhibiting suspicious kernel interaction patterns

Monitoring Recommendations

• Enable kernel audit logging to capture driver access attempts and ioctl operations
• Configure alerting for applications attempting to access hardware driver interfaces without appropriate permissions
• Monitor device firmware and security patch levels across managed device fleets
• Implement endpoint detection and response (EDR) solutions on mobile devices to detect exploitation attempts

How to Mitigate CVE-2022-22265

Immediate Actions Required

• Apply Samsung's SMR Jan-2022 Release 1 security update immediately on all affected devices
• Verify device patch levels through Settings > About phone > Software information
• Restrict installation of applications from untrusted sources
• Implement mobile device management policies to enforce timely security updates

Patch Information

Samsung has addressed this vulnerability in the SMR (Samsung Mobile Release) January 2022 Release 1 security update. Device administrators and users should apply this update through standard Samsung software update mechanisms. The patch resolves the improper exception handling condition in the NPU driver by implementing proper input validation and boundary checking. For detailed patch information, refer to the Samsung Security Update January 2022.

Given that this vulnerability is listed in the CISA Known Exploited Vulnerabilities Catalog, organizations subject to CISA directives must remediate this vulnerability according to specified timelines.

Workarounds

• If immediate patching is not possible, consider restricting device usage to trusted applications only
• Enable Samsung Knox security features if available to provide additional protection layers
• Avoid installing applications from unknown sources or third-party app stores
• Consider device replacement if devices are no longer receiving security updates

# Configuration example
# Verify current security patch level on Android device (ADB shell)
adb shell getprop ro.build.version.security_patch

# Check for Samsung-specific security patch level
adb shell getprop ro.vendor.build.security_patch

# Ensure only trusted app sources are enabled
# Settings > Biometrics and security > Install unknown apps > Disable all