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Response snapshot Oct 27, 2026, 01:13 UTC

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Advisoryproject-zero-sound-barrier-2-3bf1edc501a4

Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529

In the first part of this series, I detailed my journey into macOS security research, which led to the discovery of a type confusion vulnerability (CVE-2024-54529) and a double-free vulnerability (CVE-2025-31235) in the coreaudiod system daemon through a process I call knowledge-driven fuzzing.

At a glance

Sources
1 source

What to do

Read the exact official research article before applying its defensive techniques or drawing conclusions.

Read Google Project Zero Research: Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529 (opens a new tab)

What happened

In the first part of this series, I detailed my journey into macOS security research, which led to the discovery of a type confusion vulnerability (CVE-2024-54529) and a double-free vulnerability (CVE-2025-31235) in the coreaudiod system daemon through a process I call knowledge-driven fuzzing.

While the first post focused on the process of finding the vulnerabilities, this post dives into the intricate process of exploiting the type confusion vulnerability. I’ll explain the technical details of turning a potentially exploitable crash into a working exploit: a journey filled with dead ends, creative problem solving, and ultimately, success.

The Vulnerability: A Quick Recap If you haven’t already, I highly recommend reading my detailed writeup on this vulnerability before proceeding. As a refresher, CVE-2024-54529 is a type confusion vulnerability within the com.apple.audio.audiohald Mach service in the CoreAudio framework used by the coreaudiod process.

Several Mach message handlers, such as _XIOContext_Fetch_Workgroup_Port, would fetch a HALS_Object from the Object Map based on an ID from the Mach message, and then perform operations on it, assuming it was of a specific type (ioct) without proper validation.

Sources

  1. Primary source

    Google Project Zero Research: Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529 (opens a new tab)

    Exact official article/advisory identified by the feed; title, source dates, and any supplied article excerpt.

    Published Checked

  2. Primary source

    Google Project Zero Research syndication feed (opens a new tab)

    The RSS/Atom/RDF entry supplied this exact link and any available title, date, and excerpt.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, January 30). Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529. https://kevwire.com/record/project-zero-sound-barrier-2-3bf1edc501a4

MLA

"Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529." KEVWire, 30 Jan. 2026, kevwire.com/record/project-zero-sound-barrier-2-3bf1edc501a4.

Chicago

KEVWire. "Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529." Last modified January 30, 2026. https://kevwire.com/record/project-zero-sound-barrier-2-3bf1edc501a4.

Evidence summary (plain text)

Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529 (Jan 30, 2026).
In the first part of this series, I detailed my journey into macOS security research, which led to the discovery of a type confusion vulnerability (CVE-2024-54529) and a double-free vulnerability (CVE-2025-31235) in the coreaudiod system daemon through a process I call knowledge-driven fuzzing. While the first post focused on the process of finding the vulnerabilities, this post dives into the intricate process of exploiting the type confusion vulnerability. I’ll explain the technical details of turning a potentially exploitable crash into a working exploit: a journey filled with dead ends, creative problem solving, and ultimately, success. The Vulnerability: A Quick Recap If you haven’t already, I highly recommend reading my detailed writeup on this vulnerability before proceeding. As a refresher, CVE-2024-54529 is a type confusion vulnerability within the com.apple.audio.audiohald Mach service in the CoreAudio framework used by the coreaudiod process. Several Mach message handlers, such as _XIOContext_Fetch_Workgroup_Port, would fetch a HALS_Object from the Object Map based on an ID from the Mach message, and then perform operations on it, assuming it was of a specific type (ioct) without proper validation.
Sources:
Google Project Zero Research: Breaking the Sound Barrier, Part II: Exploiting CVE-2024-54529: https://projectzero.google/2026/01/sound-barrier-2.html
Google Project Zero Research syndication feed: https://projectzero.google/feed.xml
Record ID: project-zero-sound-barrier-2-3bf1edc501a4.
Record origin: Ingested record.
AI evidence: Not assessed.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 00:35 UTC. Ingestion is not an independent editorial investigation.

This is an excerpt of official research, not a reproduced result or evidence of exposure to a scored vulnerability.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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