CVE-2024-54529: macOS Coreaudiod Type Confusion Exploitation – Detection and Hardening

Google Project Zero's latest research, "Breaking the Sound Barrier, Part II," exposes a critical vulnerability in macOS's core audio infrastructure. The specific security issue, tracked as CVE-2024-54529, is a type confusion vulnerability residing in the coreaudiod system daemon.

While macOS is often perceived as inherently secure, vulnerabilities in system daemons running with elevated privileges pose a significant risk of Local Privilege Escalation (LPE). This post provides the technical depth required for defenders to understand the mechanics of CVE-2024-54529 and implement robust detection and remediation strategies before threat actors weaponize this research.

Technical Analysis

Affected Products & Platforms:

• Platform: macOS (Intel and Apple Silicon)
• Component: coreaudiod (Core Audio Daemon)
• Vulnerabilities: CVE-2024-54529 (Type Confusion), CVE-2025-31235 (Double Free)

Mechanism of Attack: The vulnerability stems from a type confusion flaw within the coreaudiod process. This daemon operates with high-level system privileges (usually as root) to manage audio routing and hardware interactions.

• The Flaw: The daemon incorrectly interprets the type of a memory object. By manipulating the data passed to the daemon, an attacker can coerce coreaudiod into treating one data type as another (e.g., treating an integer as a pointer).
• Exploitation Chain: As detailed by Project Zero, the exploitation involves manipulating the "knowledge-driven fuzzing" process to trigger the confusion. This results in memory corruption which, when carefully crafted, can lead to arbitrary code execution within the context of the coreaudiod daemon.
• Impact: Successful exploitation grants the attacker root privileges, effectively bypassing macOS sandboxing and SIP (System Integrity Protection) controls depending on the specific exploitation path.

Exploitation Status:

• Public PoC: Available. The researcher has successfully demonstrated the transition from a crash to a working exploit.
• In-the-Wild: Not currently observed in widespread attacks, but the publication of detailed exploit mechanics significantly increases the probability of weaponization.

Detection & Response

Detecting type confusion exploitation in system daemons requires monitoring for abnormal process behaviors and unexpected crashes. Defenders should focus on the integrity of the coreaudiod process.

SIGMA Rules

The following Sigma rules target suspicious process spawning behavior from coreaudiod and indicators of process crashes.

---
title: Potential macOS LPE via Coreaudiod Exploitation
id: 9a2b1c4d-5e6f-4a3b-8c7d-1e2f3a4b5c6d
status: experimental
description: Detects potential exploitation of CVE-2024-54529 by identifying suspicious child processes spawned by the coreaudiod daemon, which should not typically execute shells or utilities.
references:
  - https://projectzero.google/2026/01/sound-barrier-2.html
author: Security Arsenal
date: 2026/01/15
tags:
  - attack.privilege_escalation
  - attack.t1068
logsource:
  category: process_creation
  product: macos
detection:
  selection_parent:
    ParentImage|endswith: '/coreaudiod'
  selection_child:
    Image|endswith:
      - '/sh'
      - '/bash'
      - '/zsh'
      - '/python'
      - '/perl'
      - '/nc'
      - '/telnet'
  condition: all of them_*
falsepositives:
  - Legitimate debugging (rare)
level: high
---
title: Coreaudiod Unexpected Crash or Restart
id: b3c4d5e6-7f8a-9b0c-1d2e-3f4a5b6c7d8e
status: experimental
description: Detects repeated crashes of the coreaudiod process, which may indicate exploitation attempts (type confusion often causes instability before successful ROP).
references:
  - https://projectzero.google/2026/01/sound-barrier-2.html
author: Security Arsenal
date: 2026/01/15
tags:
  - attack.defense_evasion
  - attack.t1497.001
logsource:
  product: macos
  service: system
detection:
  selection:
    Message|contains:
      - 'coreaudiod'
      - 'crashed'
      - 'aborting'
    EventID: 6 # Generic syslog error identifier
  timeframe: 5m
  condition: selection | count() > 2
falsepositives:
  - Faulty audio drivers
  - Hardware glitch
level: medium

Microsoft Sentinel / Defender KQL

This KQL query hunts for coreaudiod spawning child processes, a key indicator of successful code execution, and correlates it with crash logs.

// Hunt for Coreaudiod spawning child processes or crashing
let SuspiciousProcessCreation = DeviceProcessEvents
| where InitiatingProcessFileName == "coreaudiod"
| where not(ProcessFileName in~("AudioComponentReg", "coreaudiod")) // Filter out standard internal ops if any
| project Timestamp, DeviceName, AccountName, InitiatingProcessFileName, ProcessFileName, ProcessCommandLine;
let CrashLogs = Syslog
| where ProcessName == "kernel" or SyslogMessage contains "coreaudiod"
| where SyslogMessage contains "error" or SyslogMessage contains "fault"
| project Timestamp, DeviceName, SyslogMessage;
union SuspiciousProcessCreation, CrashLogs
| order by Timestamp desc

Velociraptor VQL

Use this VQL artifact to hunt for coreaudiod crash reports on macOS endpoints and verify the integrity of the daemon binary.

-- Hunt for coreaudiod crash reports and process anomalies
SELECT 
  OSPath.Basename AS FileName,
  Mtime AS ModifiedTime,
  Size
FROM glob(globs='/*/Library/Logs/DiagnosticReports/coreaudiod*.crash')
WHERE ModifiedTime < now() - 24h

-- Check for suspicious parent-child relationships
SELECT Pid, Ppid, Name, Exe, CommandLine
FROM pslist()
WHERE Name == "coreaudiod" 
   OR (Ppid IN (SELECT Pid FROM pslist() WHERE Name == "coreaudiod") AND Name NOT IN~("coreaudiod"))

Remediation Script (Bash)

This script checks the macOS version against known patched versions (placeholder logic) and verifies the daemon status.

#!/bin/bash
# Remediation Script for CVE-2024-54529
# Checks macOS version and coreaudiod integrity

echo "[+] Checking macOS Version..."
# Note: Update the PATCHED_VERSION variable with the specific build number from Apple's advisory once released
CURRENT_OS_VERSION=$(sw_vers -productVersion)
CURRENT_BUILD=$(sw_vers -buildVersion)
PATCHED_BUILD="21A123" # EXAMPLE BUILD - REPLACE WITH ACTUAL PATCHED BUILD
echo "Current Version: $CURRENT_OS_VERSION (Build: $CURRENT_BUILD)"

# Logic to compare versions would go here
# if [[ "$CURRENT_BUILD" < "$PATCHED_BUILD" ]]; then ... fi

echo "[+] Verifying coreaudiod Daemon Status..."
if launchctl list | grep -q "com.apple.audio.coreaudiod"; then
    echo "Coreaudiod is running."
else
    echo "[WARNING] Coreaudiod is not running or has crashed. Check logs."
fi

echo "[+] Checking for recent coreaudiod crashes..."
CRASH_COUNT=$(find /Library/Logs/DiagnosticReports -name "coreaudiod*.crash" -mtime -1 | wc -l)
if [ "$CRASH_COUNT" -gt 0 ]; then
    echo "[ALERT] Found $CRASH_COUNT coreaudiod crash report(s) in the last 24 hours."
else
    echo "No recent crashes detected."
fi

echo "[ACTION REQUIRED] Ensure macOS is updated to the latest security patches addressing CVE-2024-54529."

Remediation

1. Patch Immediately: Apple has addressed this vulnerability in recent security updates. Verify that all macOS endpoints are updated to the latest supported version. Check the specific Apple Security Advisory for CVE-2024-54529 to confirm the exact build numbers (e.g., macOS Sequoia 15.x, Sonoma 14.x).
2. Restrict Local Access: Since this is a local privilege escalation vulnerability, restrict physical access and user account permissions. Ensure standard users do not have administrative privileges unless strictly necessary.
3. Audit Audio Subsystems: If you run high-security environments, consider restricting access to audio devices for untrusted applications, though this is difficult to enforce broadly on general-purpose macOS workstations.
4. Monitor for Crashes: Deploy the detection rules above. Frequent crashes in coreaudiod may indicate an active attempt to exploit this vulnerability (crash-based exploitation).

Vendor Advisory:

• Apple Security Updates
• Google Project Zero: Breaking the Sound Barrier, Part II

Related Resources

Security Arsenal Penetration Testing Services AlertMonitor Platform Book a SOC Assessment vulnerability-management Intel Hub