{"id":"CVE-2025-15514","summary":"Ollama Multi-Modal Model Image Processing NULL Pointer Dereference","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":"2026-09-17T03:30:23.965368861Z","published":"2026-01-12T23:03:52.922Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-395"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15514.json"},"references":[{"type":"WEB","url":"https://https://github.com/ollama/ollama"},{"type":"WEB","url":"https://ollama.com/"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-15514.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-15514"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15514.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-15514"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ollama-multi-modal-image-processing-null-pointer-dereference"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428828"},{"type":"PACKAGE","url":"https://github.com/ollama/ollama"},{"type":"EVIDENCE","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":"f804e8a46005b36e6f14577f4226cf2046abce12"},{"last_affected":"d925b5350c75a66e7830e00f53b243084395821f"}],"database_specific":{"extracted_events":[{"introduced":"0.11.6"},{"last_affected":"0.13.5"},{"introduced":"0.11.5-NA"},{"last_affected":"0.11.5-NA"},{"introduced":"0.11.5-rc3"},{"last_affected":"0.11.5-rc3"},{"introduced":"0.11.5-rc4"},{"last_affected":"0.11.5-rc4"},{"introduced":"0.11.5-rc5"},{"last_affected":"0.11.5-rc5"},{"introduced":"0.11.5-rc0"},{"last_affected":"0.11.5-rc0"},{"introduced":"0.11.5-rc1"},{"last_affected":"0.11.5-rc1"},{"introduced":"0.11.5-rc2"},{"last_affected":"0.11.5-rc2"}],"source":["CPE_RANGE","CPE_STRING"],"cpe":["cpe:2.3:a:ollama:ollama:*:-:*:*:*:*:*:*","cpe:2.3:a:ollama:ollama:0.11.5:-:*:*:*:*:*:*","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:*:*:*:*:*:*","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:*:*:*:*:*:*"]}}],"versions":["0.11.5-NA","0.11.5-rc0","0.11.5-rc1","0.11.5-rc2","v0.13.5-rc1","v0.13.5","v0.13.5-rc0","v0.13.4-rc2","v0.13.4","v0.13.4-rc1","v0.13.4-rc0","v0.13.3","v0.13.3-rc1","v0.13.3-rc0","v0.13.2","v0.13.2-rc2","v0.13.2-rc1","v0.13.2-rc0","v0.13.1","v0.13.1-rc2","v0.13.1-rc1","v0.13.1-rc0","v0.13.0-rc0","v0.13.0","v0.12.11","v0.12.11-rc1","v0.12.11-rc0","v0.12.10-rc1","v0.12.10","v0.12.10-rc0","v0.12.9-rc0","v0.12.9","v0.12.8-rc0","v0.12.8","v0.12.7","v0.12.7-rc1","v0.12.7-rc0","v0.12.6","v0.12.6-rc1","v0.12.6-rc0","v0.12.5-rc0","v0.12.5","v0.12.4","v0.12.4-rc7","v0.12.4-rc6","v0.12.4-rc5","v0.12.4-rc4","v0.12.4-rc3","v0.12.4-rc2","v0.12.4-rc1","v0.12.4-rc0","v0.12.3","v0.12.2-rc0","v0.12.2","v0.12.1-rc2","v0.12.1-rc1","v0.12.1","v0.12.1-rc0","v0.12.0-rc1","v0.12.0","v0.12.0-rc0","v0.11.11-rc3","v0.11.11-rc2","v0.11.11","v0.11.11-rc1","v0.11.11-rc0","v0.11.10","v0.11.9","v0.11.9-rc0","v0.11.8","v0.11.8-rc0","v0.11.7-rc1","v0.11.7-rc0","v0.11.7","v0.11.6-rc0","v0.11.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-15514.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}