{"id":"CVE-2025-15514","details":"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.","modified":"2026-04-10T05:21:52.673300Z","published":"2026-01-12T23:15:51.957Z","references":[{"type":"WEB","url":"https://https://github.com/ollama/ollama"},{"type":"WEB","url":"https://ollama.com/"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ollama-multi-modal-image-processing-null-pointer-dereference"},{"type":"FIX","url":"https://huntr.com/bounties/172df98b-07cd-41ea-a628-366f8cd525c0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ollama/ollama","events":[{"introduced":"6de62664d957a9b6606b39330af701b5f4a24035"},{"last_affected":"7325791599409de52534429897481918717a9e85"},{"introduced":"0"},{"last_affected":"f804e8a46005b36e6f14577f4226cf2046abce12"},{"introduced":"0"},{"last_affected":"d5a0d8d904baaf66a5326463a409fe4fa09b2dd2"},{"introduced":"0"},{"last_affected":"6eaf194b8540bdec2b96eafcf98481f4400bdf1e"},{"introduced":"0"},{"last_affected":"d925b5350c75a66e7830e00f53b243084395821f"},{"introduced":"0"},{"last_affected":"f804e8a46005b36e6f14577f4226cf2046abce12"},{"introduced":"0"},{"last_affected":"f804e8a46005b36e6f14577f4226cf2046abce12"},{"introduced":"0"},{"last_affected":"f804e8a46005b36e6f14577f4226cf2046abce12"}],"database_specific":{"versions":[{"introduced":"0.11.6"},{"last_affected":"0.13.5"},{"introduced":"0"},{"last_affected":"0.11.5-NA"},{"introduced":"0"},{"last_affected":"0.11.5-rc0"},{"introduced":"0"},{"last_affected":"0.11.5-rc1"},{"introduced":"0"},{"last_affected":"0.11.5-rc2"},{"introduced":"0"},{"last_affected":"0.11.5-rc3"},{"introduced":"0"},{"last_affected":"0.11.5-rc4"},{"introduced":"0"},{"last_affected":"0.11.5-rc5"}]}}],"versions":["v0.0.1","v0.0.10","v0.0.11","v0.0.12","v0.0.13","v0.0.14","v0.0.15","v0.0.16","v0.0.17","v0.0.18","v0.0.19","v0.0.2","v0.0.20","v0.0.21","v0.0.3","v0.0.4","v0.0.5","v0.0.6","v0.0.7","v0.0.8","v0.0.9","v0.1.0","v0.1.1","v0.1.10","v0.1.11","v0.1.12","v0.1.13","v0.1.14","v0.1.15","v0.1.16","v0.1.17","v0.1.18","v0.1.19","v0.1.2","v0.1.20","v0.1.21","v0.1.22","v0.1.23","v0.1.24","v0.1.25","v0.1.26","v0.1.27","v0.1.28","v0.1.29","v0.1.3","v0.1.30","v0.1.32","v0.1.32-rc1","v0.1.32-rc2","v0.1.33","v0.1.33-rc1","v0.1.33-rc2","v0.1.33-rc3","v0.1.33-rc4","v0.1.33-rc5","v0.1.33-rc6","v0.1.33-rc7","v0.1.34","v0.1.34-rc1","v0.1.35","v0.1.35-rc1","v0.1.36","v0.1.37","v0.1.38","v0.1.39","v0.1.39-rc1","v0.1.39-rc2","v0.1.4","v0.1.40","v0.1.40-rc1","v0.1.41","v0.1.42","v0.1.43","v0.1.44","v0.1.45","v0.1.45-rc1","v0.1.45-rc2","v0.1.45-rc3","v0.1.45-rc4","v0.1.45-rc5","v0.1.46","v0.1.47","v0.1.48","v0.1.49-rc1","v0.1.49-rc10","v0.1.49-rc11","v0.1.49-rc12","v0.1.49-rc13","v0.1.49-rc14","v0.1.49-rc2","v0.1.49-rc3","v0.1.49-rc4","v0.1.49-rc5","v0.1.49-rc6","v0.1.49-rc7","v0.1.49-rc8","v0.1.49-rc9","v0.1.5","v0.1.6","v0.1.7","v0.1.8","v0.1.9","v0.10.0","v0.10.0-rc0","v0.10.0-rc1","v0.10.0-rc2","v0.10.0-rc3","v0.10.0-rc4","v0.10.1","v0.11.1","v0.11.10","v0.11.11","v0.11.11-rc0","v0.11.11-rc1","v0.11.11-rc2","v0.11.11-rc3","v0.11.2","v0.11.3","v0.11.3-rc0","v0.11.4","v0.11.4-rc0","v0.11.5","v0.11.5-rc0","v0.11.5-rc1","v0.11.5-rc2","v0.11.5-rc3","v0.11.5-rc4","v0.11.5-rc5","v0.11.6","v0.11.6-rc0","v0.11.7","v0.11.7-rc0","v0.11.7-rc1","v0.11.8","v0.11.8-rc0","v0.11.9","v0.11.9-rc0","v0.12.0","v0.12.0-rc0","v0.12.0-rc1","v0.12.1","v0.12.1-rc0","v0.12.1-rc1","v0.12.1-rc2","v0.12.10","v0.12.10-rc0","v0.12.10-rc1","v0.12.11","v0.12.11-rc0","v0.12.11-rc1","v0.12.2","v0.12.2-rc0","v0.12.3","v0.12.4","v0.12.4-rc0","v0.12.4-rc1","v0.12.4-rc2","v0.12.4-rc3","v0.12.4-rc4","v0.12.4-rc5","v0.12.4-rc6","v0.12.4-rc7","v0.12.5","v0.12.5-rc0","v0.12.6","v0.12.6-rc0","v0.12.6-rc1","v0.12.7","v0.12.7-rc0","v0.12.7-rc1","v0.12.8","v0.12.8-rc0","v0.12.9","v0.12.9-rc0","v0.13.0","v0.13.0-rc0","v0.13.1","v0.13.1-rc0","v0.13.1-rc1","v0.13.1-rc2","v0.13.2","v0.13.2-rc0","v0.13.2-rc1","v0.13.2-rc2","v0.13.3","v0.13.3-rc0","v0.13.3-rc1","v0.13.4","v0.13.4-rc0","v0.13.4-rc1","v0.13.4-rc2","v0.13.5","v0.13.5-rc0","v0.13.5-rc1","v0.2.0","v0.2.1","v0.2.2","v0.2.2-rc1","v0.2.2-rc2","v0.2.3","v0.2.4","v0.2.5","v0.2.6","v0.2.7","v0.2.8","v0.2.8-rc1","v0.2.8-rc2","v0.3.0","v0.3.1","v0.3.10","v0.3.10-rc1","v0.3.11","v0.3.11-rc1","v0.3.11-rc2","v0.3.11-rc3","v0.3.11-rc4","v0.3.12","v0.3.12-rc1","v0.3.12-rc2","v0.3.12-rc3","v0.3.12-rc4","v0.3.12-rc5","v0.3.13","v0.3.14","v0.3.14-rc0","v0.3.2","v0.3.3","v0.3.4","v0.3.5","v0.3.6","v0.3.7","v0.3.7-rc1","v0.3.7-rc2","v0.3.7-rc3","v0.3.7-rc4","v0.3.7-rc5","v0.3.7-rc6","v0.3.8","v0.3.9","v0.4.0","v0.4.0-rc6","v0.4.0-rc7","v0.4.0-rc8","v0.4.1","v0.4.1-rc0","v0.4.2","v0.4.2-rc0","v0.4.2-rc1","v0.4.3","v0.4.3-rc0","v0.4.4","v0.4.5","v0.4.6","v0.4.7","v0.4.8-rc0","v0.5.0","v0.5.0-rc1","v0.5.1","v0.5.12","v0.5.12-rc0","v0.5.12-rc1","v0.5.13","v0.5.13-rc0","v0.5.13-rc1","v0.5.13-rc2","v0.5.13-rc3","v0.5.13-rc4","v0.5.13-rc5","v0.5.13-rc6","v0.5.14-rc0","v0.5.2","v0.5.2-rc0","v0.5.2-rc1","v0.5.2-rc2","v0.5.2-rc3","v0.5.3","v0.5.3-rc0","v0.5.4","v0.5.5","v0.5.5-rc0","v0.5.6","v0.5.7","v0.5.8","v0.5.8-rc0","v0.5.8-rc1","v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