CVE-2024-8063Public exploitNetwork attack vector

Remote server crash via crafted GGUF block count

Published Mar 20, 2025 · Updated Mar 20, 2025

Divide by zero in Ollama 0.3.3 and earlier allows remote attackers to crash the server by importing a crafted GGUF model. During GGUF import, model metadata accepts a crafted type for block_count and uses the resulting zero value as a divisor. An unauthenticated network request that submits the malicious model is sufficient to terminate the serving process, interrupting model API availability.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide by zero in Ollama 0.3.3 and earlier allows remote attackers to crash the server by importing a crafted GGUF model. During GGUF import, model metadata accepts a crafted type for block_count and uses the resulting zero value as a divisor. An unauthenticated network request that submits the malicious model is sufficient to terminate the serving process, interrupting model API availability.

The record

CVE
CVE-2024-8063
Published
Mar 20, 2025
Updated
Mar 20, 2025
Vendor
Ollama
Product
Ollama
Classifications
CWE-369, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=latest

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ollama · Ollamaversion=unspecified <=latest

Published CVSS scores

7.5GitHubCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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