CVE-2026-84286
OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table
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.
INFO
Published Date :
Oct. 12, 2026, 5:17 p.m.
Last Modified :
Oct. 12, 2026, 6:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-84286
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Validate model-supplied index is within bounds.
- Update ExLlamaV3 loader to include bounds checking.
- Avoid loading untrusted models.
- Review host memory layouts for potential exploits.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-84286.
| URL | Resource |
|---|---|
| https://github.com/turboderp-org/exllamav3/pull/310 | |
| https://kb.cert.org/vuls/id/369611 | |
| https://www.kb.cert.org/vuls/id/369611 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-84286 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-84286
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-84286 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-84286 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Oct. 12, 2026
Action Type Old Value New Value Added Reference https://www.kb.cert.org/vuls/id/369611 -
New CVE Received by [email protected]
Oct. 12, 2026
Action Type Old Value New Value 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/84xxx/CVE-2026-84286.json">CVE-2026-84286</a> Added Reference https://github.com/turboderp-org/exllamav3/pull/310 Added Reference https://kb.cert.org/vuls/id/369611