Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2025-15514

Gravedad CVSS v4.0:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
12/01/2026
Última modificación:
21/01/2026

Descripción

*** Pendiente de traducción *** 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.

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:a:ollama:ollama:*:-:*:*:*:*:*:* 0.11.6 (incluyendo) 0.13.5 (incluyendo)
cpe:2.3:a:ollama:ollama:0.11.5:-:*:*:*:*:*:*
cpe:2.3:a:ollama:ollama:0.11.5:rc0:*:*:*:*:*:*
cpe:2.3:a:ollama:ollama:0.11.5:rc1:*:*:*:*:*:*
cpe:2.3:a:ollama:ollama:0.11.5:rc2:*:*:*:*:*:*
cpe:2.3:a:ollama:ollama:0.11.5:rc3:*:*:*:*:*:*
cpe:2.3:a:ollama:ollama:0.11.5:rc4:*:*:*:*:*:*
cpe:2.3:a:ollama:ollama:0.11.5:rc5:*:*:*:*:*:*