CVE-2025-0317 Divide By Zero in ollama/ollama

What is CVE-2025-0317?

CVE-2025-0317 is a high-severity denial of service vulnerability in ollama/ollama, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in ollama/ollama versions <=0.3.14 allows a malicious user to upload and create a customized GGUF model file on the Ollama server. This can lead to a division by zero error in the ggufPadding function, causing the server to crash and resulting in a Denial of Service (DoS) attack.

Weakness: CWE-369

Which versions are affected by CVE-2025-0317?

3 open source packages ship an affected version, including github.com/ollama/ollama. It affects 1 product.

Products include Ollama Ollama.

How do I fix CVE-2025-0317?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-0317 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-0317 exists.

Other vulnerabilities in ollama/ollama

• CVE-2025-63389 Ollama Platform has missing authentication enabling attackers to perform model management operations Critical 9.8
• CVE-2024-45436 Ollama can extract members of a ZIP archive outside of the parent directory Critical 9.1
• CVE-2026-7482 Ollama heap out-of-bounds read in GGUF tensor parsing leaks server process memory to unauthenticated remote attackers High 8.8
• CVE-2024-37032 Ollama does not validate the format of the digest (sha256 with 64 hex digits) High 8.8
• CVE-2025-15514 Ollama Multi-Modal Model Image Processing NULL Pointer Dereference High 8.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9gcr-28rp-cc24, GO-2025-3559, MINI-3cfw-6457-wfq2, MINI-87pp-rrc4-gwhp.