Out-of-bounds write in turboderp-org ExLlamaV2 GPTQ index handling
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A flaw in turboderp-org ExLlamaV2 up to and including 0.3.2 affects the QMatrix::make_sequential function in the GPTQ index handler. Manipulating the g_idx argument can cause an out-of-bounds write (CWE-787). A local attacker with low privileges can trigger it, and the project has not responded to an early issue report about the problem.
Written with Claude Haiku 5.5 from the sources below · 2026-11-02
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Turboderp-org | ExLlamaV2 | 0.3.0; 0.3.1; 0.3.2 | — | No fix listed | CNA |
- ExLlamaV2 VendorTurboderp-org Affected 0.3.0; 0.3.1; 0.3.2 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:turboderp-org:exllamav2:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:turboderp-org:exllamav2:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
The sources list no fixed version for ExLlamaV2.
Written with Claude Haiku 5.5 from the sources below · 2026-11-02
Timeline
- 2026-10-26 Threatist record created from CVE-2026-116502
- 2026-10-27 Alias added: GHSA-56qq-ww5r-ph3r
- 2026-11-02 CISA SSVC decision points changed
References
More Turboderp-org vulnerabilities
- TI-2026-71208 Out-of-bounds read and write in ExLlamaV3 kernel table CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-116502 · CVE Program
- CVE-2026-116502 · NVD
- FIRST EPSS
- GHSA-56qq-ww5r-ph3r · GitHub Advisory Database · CC BY 4.0
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