High 8.7Published Jan 12, 2026

CVE-2025-15514Ollama Multi-Modal Model Image Processing NULL Pointer Dereference

Updated under an hour ago (Oct 27, 2026, 2:00 AM ET)

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Every CVE for Ollama

Exploited in the last 30 days

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: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-395
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Modified
Record last updated: Sep 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Ollama Ollama ollama:ollama (from the name)	from v0.11.5-rc0 through 0.13.5	CNA record
Red Hat Red Hat Ansible Automation Platform 2 redhat:ansible_automation_platform	2	CISA ADP
Red Hat Red Hat OpenShift AI (RHOAI) redhat:openshift_ai	All versions	CISA ADP
ollama ollama ollama:ollama	from 0.11.6 through 0.13.5; 0.11.5; 0.11.5; 0.11.5; 0.11.5; 0.11.5; 0.11.5; 0.11.5	NVD

References

References

https://huntr.com/bounties/172df98b-07cd-41ea-a628-366f8cd525c0	technical-description, exploit, patch, third-party-advisory
https://ollama.com/	product
https://https://github.com/ollama/ollama	product
https://www.vulncheck.com/advisories/ollama-multi-modal-image-processing-null-pointer-dereference	third-party-advisory
https://access.redhat.com/security/cve/CVE-2025-15514
https://bugzilla.redhat.com/show_bug.cgi?id=2428828
https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-15514.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.