CVE-2026-65315: high-severity vulnerability in Ollama
Ollama Remote Denial of Service via Attacker-Controlled Allocation in GGUF Metadata Parser
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.8%
Ollama (HEAD f0078ae) contains an uncontrolled memory allocation vulnerability in the GGUF metadata parser that allows remote attackers to crash the server by supplying a crafted GGUF file with attacker-controlled length and count fields in string lengths, tensor dimension counts, and metadata array counts that are used as allocation sizes without validation against remaining file size. Attackers can upload a sub-1KB crafted GGUF file via the blob upload and model create or pull API endpoints to trigger unrecoverable Go runtime out-of-memory fatal errors or makeslice panics that bypass recovery middleware and crash the entire server process.
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
Affected products
Ollama · OllamaRelated CVEs — Ollama
In the same product, most dangerous first.
CVE-2026-42249HIGHRemote Code Execution in Ollama via Update MechanismEPSS 1.0%CVE-2025-15514HIGHOllama Multi-Modal Model Image Processing NULL Pointer DereferenceEPSS 0.8%CVE-2026-42248HIGHMissing Signature Verification for Updates in OllamaEPSS 0.7%CVE-2026-15685HIGHOllama downloadBlob Improper Validation of Array Index Denial-of-Service VulnerabilityEPSS 0.7%CVE-2026-103663MEDIUMPath Traversal leading to Remote Code Execution in OllamaEPSS 0.7%