Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ollama | Ollama | >= 0.11.6, <= 0.13.5 |
Related Weaknesses (CWE)
References
- https://https://github.com/ollama/ollamaProduct
- https://huntr.com/bounties/172df98b-07cd-41ea-a628-366f8cd525c0ExploitPatchThird Party Advisory
- https://ollama.com/Product
- https://www.vulncheck.com/advisories/ollama-multi-modal-image-processing-null-poThird Party Advisory
FAQ
What is CVE-2025-15514?
CVE-2025-15514 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2025-15514?
CVE-2025-15514 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-15514?
Check the references section above for vendor advisories and patch information. Affected products include: Ollama Ollama.