What’s Vulnerable › Vulnerabilities
CVE-2026-84286: OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-12 · updated 2026-10-19
- Weakness: CWE-20
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.
Affected products
References
- https://github.com/turboderp-org/exllamav3/pull/310
- https://kb.cert.org/vuls/id/369611
- https://www.kb.cert.org/vuls/id/369611
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