Application crash via unchecked GGUF tensor pointer
Published Nov 21, 2025 · Updated Nov 21, 2025
Wild pointer dereference in Apple MLX before 0.29.4 allows attackers to crash applications by loading a malicious GGUF file. In mlx/io/gguf.cpp, extract_tensor_data() passes gguflib's unvalidated tensor->weights_data pointer to memcpy(), which performs a read and triggers a segmentation fault. The vulnerable path is reached only when an application loads unsanitized model weights; the demonstrated consequence is an uncatchable process crash.
Summary
What happened
Wild pointer dereference in Apple MLX before 0.29.4 allows attackers to crash applications by loading a malicious GGUF file. In mlx/io/gguf.cpp, extract_tensor_data() passes gguflib's unvalidated tensor->weights_data pointer to memcpy(), which performs a read and triggers a segmentation fault. The vulnerable path is reached only when an application loads unsanitized model weights; the demonstrated consequence is an uncatchable process crash.
The record
- CVE
- CVE-2025-62609
- Published
- Nov 21, 2025
- Updated
- Nov 21, 2025
- Vendor
- Apple
- Product
- MLX
- Classifications
- CWE-476, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 21, 2025CVE publishedPublication date reported by the CVE source.
- Nov 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.29.4
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Malicious GGUF proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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