CVE-2026-0113: Google Android Privilege Escalation Flaw

CVE-2026-0113 Overview

CVE-2026-0113 is a critical out-of-bounds write vulnerability in the ns_GetUserData function of ns_SmscbUtilities.c within Google Android. The vulnerability stems from an incorrect bounds check that allows attackers to write data outside the intended memory boundaries. This flaw enables remote escalation of privilege without requiring any additional execution privileges or user interaction, making it particularly dangerous for mobile device security.

Critical Impact

Remote attackers can exploit this vulnerability to achieve privilege escalation on affected Android devices without user interaction, potentially gaining complete control over the device.

Affected Products

• Google Android (all versions prior to the March 2026 security patch)
• Google Pixel devices (prior to March 2026 Pixel security update)

Discovery Timeline

• 2026-03-10 - CVE-2026-0113 published to NVD
• 2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-0113

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-bounds Write), a memory corruption flaw that occurs when the ns_GetUserData function in ns_SmscbUtilities.c fails to properly validate buffer boundaries before writing data. The incorrect bounds check allows an attacker to write arbitrary data beyond the allocated memory region.

The vulnerability is particularly severe because it can be exploited remotely over the network without requiring any user interaction or prior authentication. An attacker could potentially leverage this flaw to corrupt memory, overwrite critical data structures, or inject malicious code into the process memory space. Successful exploitation results in privilege escalation, potentially granting the attacker elevated permissions on the target Android device.

Root Cause

The root cause of CVE-2026-0113 lies in an incorrect bounds check within the ns_GetUserData function. When processing user data in the SMS Cell Broadcast (SMSCB) utilities component, the function fails to properly validate the size or offset of incoming data against the allocated buffer size. This improper input validation allows data to be written beyond the intended memory boundaries, leading to memory corruption that can be exploited for privilege escalation.

Attack Vector

The vulnerability is exploitable via the network attack vector. An attacker can remotely trigger the vulnerable code path without requiring any privileges on the target system. The attack does not require user interaction, meaning the exploitation can occur silently in the background. The SMSCB (SMS Cell Broadcast) functionality processes broadcast messages, and a maliciously crafted message could trigger the out-of-bounds write condition, allowing the attacker to escalate privileges on the affected Android device.

The exploitation flow involves sending specially crafted data that causes the ns_GetUserData function to write beyond its allocated buffer. This can corrupt adjacent memory structures, potentially allowing the attacker to hijack control flow and execute arbitrary code with elevated privileges.

Detection Methods for CVE-2026-0113

Indicators of Compromise

• Unexpected crashes or reboots of Android devices, particularly in telephony or messaging services
• Anomalous SMS Cell Broadcast activity or unusual broadcast message patterns
• Memory corruption signatures in system logs related to ns_SmscbUtilities components
• Unauthorized privilege escalation events detected in security audit logs

Detection Strategies

• Monitor for abnormal memory access patterns in the Android telephony subsystem
• Implement runtime application self-protection (RASP) to detect out-of-bounds write attempts
• Deploy mobile threat detection solutions capable of identifying exploitation attempts
• Review system logs for crashes or exceptions in SMSCB-related processes

Monitoring Recommendations

• Enable verbose logging for telephony and messaging services on Android devices
• Implement network-level monitoring for anomalous SMS Cell Broadcast traffic patterns
• Deploy endpoint detection and response (EDR) solutions with mobile device coverage
• Establish baseline behavior for SMSCB components to identify deviations

How to Mitigate CVE-2026-0113

Immediate Actions Required

• Apply the March 2026 Android Security Patch immediately to all affected devices
• Prioritize patching for devices with exposure to untrusted networks
• Review device fleet for Android systems that may not have received the security update
• Consider implementing network segmentation to limit exposure of unpatched devices

Patch Information

Google has addressed this vulnerability in the Android Security Bulletin March 2026. For Pixel devices, refer to the Pixel Security Bulletin March 2026. Organizations should ensure all Android devices are updated to the security patch level dated 2026-03-01 or later to remediate this vulnerability.

Workarounds

• No official workarounds have been published; applying the security patch is the recommended remediation
• Limit device exposure to untrusted networks until patches can be applied
• Implement mobile device management (MDM) policies to enforce security update compliance
• Consider disabling or restricting SMS Cell Broadcast functionality if not required in your environment