ExLlamaV3’s EXL3 loader uses an untrusted, model-supplied index to select a CUDA kernel without first verifying that the index is within bounds. A malicious model can force the code to read and invoke an out‑of‑range function pointer, resulting in a reproducible crash. Under specific conditions involving certain host memory layouts, it may be possible for an attacker to exploit this vulnerability to achieve controlled indirect kernel dispatch during model load.

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History

Mon, 12 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-126
CWE-188

Mon, 12 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
References

Mon, 12 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Description ExLlamaV3’s EXL3 loader uses an untrusted, model-supplied index to select a CUDA kernel without first verifying that the index is within bounds. A malicious model can force the code to read and invoke an out‑of‑range function pointer, resulting in a reproducible crash. Under specific conditions involving certain host memory layouts, it may be possible for an attacker to exploit this vulnerability to achieve controlled indirect kernel dispatch during model load.
Title OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-10-12T17:14:02.436Z

Reserved: 2026-09-01T15:47:57.172Z

Link: CVE-2026-84286

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-12T17:17:35.873

Modified: 2026-10-12T18:17:24.160

Link: CVE-2026-84286

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T19:15:14Z

Weaknesses