OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table
Summary
| CVE | CVE-2026-84286 |
|---|---|
| State | PUBLISHED |
| Assigner | certcc |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-12 17:17:35 UTC |
| Updated | 2026-10-12 18:17:24 UTC |
| 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. |
Risk And Classification
Problem Types: CWE-125 Out-of-bounds Read | CWE-787 Out-of-bounds Write | CWE-20 Improper Input Validation
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Turboderp-org | ExLlamaV3 | affected 3 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| 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 | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.