CVE-2025-15514 (GCVE-0-2025-15514)

Vulnerability from cvelistv5 – Published: 2026-01-12 23:03 – Updated: 2026-01-13 17:19
VLAI?
Title
Ollama Multi-Modal Model Image Processing NULL Pointer Dereference
Summary
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.
Severity ?
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-395 - Use of NullPointerException Catch to Detect NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Ollama Ollama Affected: v0.11.5-rc0 , ≤ 0.13.5 (semver)
Create a notification for this product.
Credits
Weblover
Show details on NVD website
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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