CVE-2026-58880: Google Android Privilege Escalation Flaw

CVE-2026-58880 Overview

CVE-2026-58880 is a race condition vulnerability in the Android Bluetooth stack, specifically within the handle_app_val_response function of btif_rc.cc. The flaw affects the Audio/Video Remote Control Profile (AVRCP) implementation and can lead to local code execution. Successful exploitation enables privilege escalation without requiring user interaction or additional execution privileges. Google addressed this issue in the October 2026 Android Security Bulletin.

Critical Impact
A local attacker winning the race in the Bluetooth process can execute arbitrary code and escalate privileges on affected Android devices without user interaction.

Affected Products

Google Android 16.0 (including QPR2 Beta 1, Beta 2, Beta 3)
Google Android 17.0
Bluetooth AVRCP component (btif_rc.cc)

Discovery Timeline

2026-10-01 - Google releases security patch in the Android Security Bulletin
2026-10-05 - CVE-2026-58880 published to NVD
2026-10-07 - Last updated in NVD database

Technical Details for CVE-2026-58880

Vulnerability Analysis

The vulnerability resides in the handle_app_val_response function within btif_rc.cc, part of the Bluetooth Interface (BTIF) layer that handles AVRCP player application setting responses. The function processes responses from remote Bluetooth devices concerning configurable player attributes such as equalizer, repeat, and shuffle modes.

Because multiple threads access shared state during response handling, improper synchronization creates a race window. An attacker who times operations correctly can trigger memory corruption or cause the Bluetooth process to operate on stale or attacker-controlled data. The result is code execution within the Bluetooth process context, which carries elevated system privileges on Android.

Root Cause

The root cause is a concurrency defect classified as [CWE-362] Concurrent Execution using Shared Resource with Improper Synchronization. Shared state accessed during AVRCP response processing is not adequately protected against concurrent modification. Thread interleaving during handler execution allows an attacker to manipulate object state between validation and use.

Attack Vector

Exploitation requires local access with low privileges, matching the CVSS Local attack vector designation. An adversary with the ability to interact with the Bluetooth subsystem — through a malicious application or a paired remote Bluetooth peer — can trigger carefully timed AVRCP responses to induce the race. Attack complexity is high because exploitation depends on precise timing to win the race window. No user interaction is required, and successful exploitation yields code execution in the Bluetooth process.

No verified proof-of-concept code is publicly available. See the Android Security Bulletin October 2026 for additional technical context.

Detection Methods for CVE-2026-58880

Indicators of Compromise

Unexpected crashes or restarts of the com.android.bluetooth process logged in logcat or Android tombstone files
Anomalous AVRCP traffic patterns from paired or newly paired Bluetooth devices
Installation of applications requesting Bluetooth permissions without clear functional justification

Detection Strategies

Monitor Android device logs for repeated Bluetooth process crashes or signal 11 (SIGSEGV) tombstones referencing btif_rc
Review installed applications on managed devices for unexpected Bluetooth capability usage
Correlate device-side telemetry with mobile threat defense alerts for suspicious local privilege escalation attempts

Monitoring Recommendations

Enroll devices in a mobile device management (MDM) solution to track Android patch level against the October 2026 security patch level or later
Audit paired Bluetooth device inventories periodically for unknown or untrusted peers
Enable crash reporting pipelines that forward Bluetooth stack failures to a central analytics platform

How to Mitigate CVE-2026-58880

Immediate Actions Required

Apply the October 2026 Android Security Bulletin patch (security patch level 2026-10-01 or later) to all affected devices
Verify managed device fleets are running Android 16.0 or 17.0 with the current patch level enforced via MDM policy
Restrict installation of untrusted applications that request Bluetooth permissions

Patch Information

Google has released a fix as part of the Android Security Bulletin October 2026. Device manufacturers (OEMs) distribute the patch through firmware updates. Users should install updates as soon as they are offered by the device vendor.

Workarounds

Disable Bluetooth when not actively in use to eliminate the attack surface for remote AVRCP interactions
Avoid pairing with untrusted Bluetooth devices and remove unused pairings from the device inventory
Enforce application allowlisting on managed devices to block unknown apps that could trigger the vulnerable code path locally

bash

# Verify Android security patch level on a device via ADB
adb shell getprop ro.build.version.security_patch
# Expected output: 2026-10-01 or later