Description
A vulnerability was found in Ollama up to 0.31.1. This issue affects the function readGGUFV1String of the file fs/ggml/gguf.go of the component GGUF Decoder. Performing a manipulation results in integer overflow. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 0.31.2-rc1 is capable of addressing this issue. The patch is named 67b6a1c2d45321e0cb3c04a18073f9818de7724b. It is recommended to upgrade the affected component.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Ollama | 0.31.0, 0.31.1 | 0.31.2-rc1 |
Advisories 1
- WID-SEC-2026-3213 Ollama: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 7, 2026
References
- VDB-399448 | Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow vdb-entry technical-description
- VDB-399448 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-86289 | CVE Analysis and Report third-party-advisory
- Submit #906136 | Ollama <= 0.17.1 Integer Overflow third-party-advisory
- https://github.com/ollama/ollama/issues/17033 exploit issue-tracking
- https://github.com/ollama/ollama/pull/17062 issue-tracking patch
- https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724b patch
- https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1 patch
- https://github.com/ollama/ollama/ product