Vulnerability Details CVE-2025-15514
Ollama 0.11.5-rc0 through current version 0.13.5 contain a null pointer dereference vulnerability in the multi-modal model image processing functionality. When processing base64-encoded image data via the /api/chat endpoint, the application fails to validate that the decoded data represents valid media before passing it to the mtmd_helper_bitmap_init_from_buf function. This function can return NULL for malformed input, but the code does not check this return value before dereferencing the pointer in subsequent operations. A remote attacker can exploit this by sending specially crafted base64 image data that decodes to invalid media, causing a segmentation fault and crashing the runner process. This results in a denial of service condition where the model becomes unavailable to all users until the service is restarted.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 41.5%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2025-15514
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cpe:2.3:a:ollama:ollama:0.11.11
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cpe:2.3:a:ollama:ollama:0.11.5
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cpe:2.3:a:ollama:ollama:0.11.6
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cpe:2.3:a:ollama:ollama:0.11.7
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cpe:2.3:a:ollama:ollama:0.11.8
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cpe:2.3:a:ollama:ollama:0.11.9
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cpe:2.3:a:ollama:ollama:0.12.0
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cpe:2.3:a:ollama:ollama:0.12.1
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cpe:2.3:a:ollama:ollama:0.12.10
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cpe:2.3:a:ollama:ollama:0.12.11
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cpe:2.3:a:ollama:ollama:0.12.2
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cpe:2.3:a:ollama:ollama:0.12.4
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cpe:2.3:a:ollama:ollama:0.12.5
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cpe:2.3:a:ollama:ollama:0.12.6
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cpe:2.3:a:ollama:ollama:0.12.7
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cpe:2.3:a:ollama:ollama:0.12.8
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cpe:2.3:a:ollama:ollama:0.12.9
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cpe:2.3:a:ollama:ollama:0.13.0
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cpe:2.3:a:ollama:ollama:0.13.1
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cpe:2.3:a:ollama:ollama:0.13.2
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cpe:2.3:a:ollama:ollama:0.13.3
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cpe:2.3:a:ollama:ollama:0.13.4
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cpe:2.3:a:ollama:ollama:0.13.5