CVE-2026-65315: Ollama uncontrolled memory allocation in GGUF metadata parser via crafted file

Summary

CVE-2026-65315 affects Ollama at HEAD f0078ae. The GGUF metadata parser allocates memory based on attacker-controlled length, count and dimension fields without checking them against the remaining file size. A remote attacker can upload a crafted GGUF file under 1KB through the blob upload, model create or pull API endpoints, causing an unrecoverable Go out-of-memory fatal error or makeslice panic. Because these bypass recovery middleware, the entire server process crashes.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Topics

• Inference infrastructure

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