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Vulnerabilities CVE-2026-65315

CVE-2026-65315

High
Open
TLP:CLEAR

Ollama Remote Denial of Service via Attacker-Controlled Allocation in GGUF Metadata Parser

AI Analysis

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Description

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.

Details

CVSS Score
8.7
EPSS Score
0.57%

44.3th percentile

CVSS Vector
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
Confidence
90%
Published
Jul 21, 2026
Last Modified
Jul 28, 2026
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