Buffer overflow in Turboderp-Org Exllamav2
CVE-2026-116502
A flaw has been found in turboderp-org ExLlamaV2 up to 0.3.2. The impacted element is the function QMatrix::make_sequential of the file exllamav2/exllamav2_ext/cuda/q_matrix.cu of the component GPTQ Index Handler. Executing a manipulation of the argument g_idx can lead to out-of-bounds write. The attack needs to be launched locally. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Turboderp-Org Exllamav2 — versions 0.3.0, 0.3.1, 0.3.2
Weakness classification (CWE)
References
- vuldb.com/vuln/426401 (technical-description, vdb-entry)
- vuldb.com/vuln/426401/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-116502 (third-party-advisory)
- vuldb.com/submit/1022425 (third-party-advisory)
- github.com/turboderp-org/exllamav2/issues/817 (issue-tracking)
- github.com/turboderp-org/exllamav2/ (product)
Frequently asked questions
- What is CVE-2026-116502?
- CVE-2026-116502 is a medium-severity vulnerability in Turboderp-Org Exllamav2, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.4/10. Published 2026-10-26.
- How severe is CVE-2026-116502?
- Medium severity. CVSS v3 base score is 4.4 out of 10.