OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-84286
StatePUBLISHED
Assignercertcc
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-12 17:17:35 UTC
Updated2026-10-19 12:17:10 UTC
DescriptionExLlamaV3’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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-20 | CWE-125 | CWE-787 | CWE-125 Out-of-bounds Read | CWE-787 Out-of-bounds Write | CWE-20 Improper Input Validation | CWE-125 CWE-125 Out-of-bounds Read | CWE-787 CWE-787 Out-of-bounds Write | CWE-20 CWE-20 Improper Input Validation

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Turboderp-org ExLlamaV3 affected 3 Not specified

References

ReferenceSourceLinkTags
github.com/turboderp-org/exllamav3/pull/310 [email protected] github.com
www.kb.cert.org/vuls/id/369611 af854a3a-2127-422b-91ae-364da2661108 www.kb.cert.org
kb.cert.org/vuls/id/369611 [email protected] kb.cert.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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