CVE-2026-57014: NFC HAL Privilege Escalation Vulnerability

CVE-2026-57014 is a privilege escalation vulnerability in the NFC HAL component affecting phNxpNciHal_ext_process_nfc_init_rsp function. This flaw allows local attackers to gain elevated privileges without user interaction. This article covers technical details, affected versions, impact assessment, and mitigation strategies.

CVE-2026-57014 Overview

CVE-2026-57014 is an out-of-bounds write vulnerability in the Android NFC Hardware Abstraction Layer (HAL). The flaw resides in the phNxpNciHal_ext_process_nfc_init_rsp function within phNxpNciHal_ext.cc, which processes NFC Controller Interface (NCI) initialization responses. A missing bounds check allows a local attacker to write beyond an allocated buffer.

Successful exploitation leads to local privilege escalation without requiring user interaction or additional execution privileges. The issue is tracked under [CWE-787] (Out-of-bounds Write) and was published in the Android Security Bulletin September 2026.

Critical Impact
A local attacker can trigger a memory corruption in the NFC HAL to escalate privileges on affected Android devices without user interaction.

Affected Products

Android devices using the NXP NFC HAL implementation
Google Pixel devices referenced in the Android Security Bulletin September 2026
Android builds incorporating the phNxpNciHal_ext.cc component prior to the September 2026 patch level

Discovery Timeline

2026-09-15 - CVE-2026-57014 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-57014

Vulnerability Analysis

The vulnerability exists in phNxpNciHal_ext_process_nfc_init_rsp, a function responsible for parsing NCI initialization response messages returned by the NFC controller. The function processes response data and writes fields into an internal buffer used by the NFC HAL. Because the routine does not validate the length of the incoming response against the destination buffer size, an attacker-controlled input can overflow the buffer.

Out-of-bounds writes in privileged native components such as the NFC HAL are useful primitives for corrupting adjacent structures, function pointers, or heap metadata. Since the NFC HAL runs with elevated privileges relative to a standard app, memory corruption here can be leveraged to gain code execution within the HAL context.

Root Cause

The root cause is a missing bounds check on data processed during NFC initialization response handling. The parsing logic in phNxpNciHal_ext.cc trusts a length or offset value derived from the response payload and writes to a fixed-size buffer without validating that the write remains within allocated bounds. This is a classic [CWE-787] pattern.

Attack Vector

Exploitation requires local access with low privileges on the device. An attacker who can influence data reaching the NFC HAL, such as through a malicious local component or a controlled NFC controller response path, can supply crafted input that triggers the out-of-bounds write. User interaction is not required, and successful exploitation results in privilege escalation within the NFC service context.

No public proof-of-concept exploit is currently associated with this CVE, and it is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Android Security Bulletin September 2026 for authoritative technical details.

Detection Methods for CVE-2026-57014

Indicators of Compromise

Unexpected crashes or restarts of the NFC service (com.android.nfc) or the NXP NFC HAL process
Native crash logs referencing phNxpNciHal_ext_process_nfc_init_rsp or phNxpNciHal_ext.cc
Anomalous NFC initialization sequences captured in logcat or vendor NFC logs

Detection Strategies

Monitor Android device logs for repeated NFC HAL crashes and SIGSEGV or SIGABRT signals originating from the NFC stack
Correlate NFC subsystem faults with subsequent privilege changes or unexpected process behavior on the device
Track devices reporting security patch levels earlier than September 2026 across the mobile fleet

Monitoring Recommendations

Enroll Android devices in a Mobile Device Management (MDM) or Enterprise Mobility Management (EMM) solution that surfaces patch level and OS build data
Alert on devices that fall behind the September 2026 Android security patch level
Review vendor and carrier update dashboards to confirm timely delivery of Android Security Bulletin fixes

How to Mitigate CVE-2026-57014

Immediate Actions Required

Apply the September 2026 Android security patch level or later on all affected devices
Prioritize patching for devices using NXP NFC hardware and the associated HAL
Inventory the mobile fleet to identify devices that cannot receive the patch and plan for replacement or restricted use

Patch Information

Google addressed CVE-2026-57014 in the September 2026 Android Security Bulletin. Device manufacturers integrate the fix into vendor builds tied to the 2026-09-01 or later security patch level. Refer to the Android Security Bulletin September 2026 for the authoritative patch reference and device-specific update guidance.

Workarounds

Disable NFC on devices that do not require it until the September 2026 patch is applied
Restrict installation of untrusted applications through enterprise app allowlisting policies
Enforce minimum patch level requirements through MDM compliance policies to block non-compliant devices from accessing corporate resources