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TI-2026-46521 Aliases CVE-2026-65315GHSA-9hhj-2jwx-r87p

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

Priority MEDIUM 45CWE-789Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Will not fix Red Hat: no fix planned

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-789.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00807 57th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:ollama:ollama:*:*:*:*:*:*:*:*——ollama
  • cpe:2.3:a:ollama:ollama:*:*:*:*:*:*:*:* Versions — — ·ollama

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2AffectedNo fix planned: Will not fix
Not affected: 3 products
  • Migration Toolkit for Applications 8
  • Red Hat Ansible Automation Platform 2
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65315
  2. 2026-10-03 Alias added: GHSA-9hhj-2jwx-r87p

References

Patch 1

Other 1

  • TI-2024-24572 Ollama before 0.1.34 does not validate the format of the digest (sha256 with 64 hex… CVSS 3.1HIGH 8.8
  • TI-2025-14153 Ollama Multi-Modal Model Image Processing NULL Pointer Dereference CVSS 4.0HIGH 8.7
  • TI-2024-26641 An issue was discovered in Ollama before 0.1.46. CVSS 3.1HIGH 8.2
  • TI-2025-41098 An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via… CVSS 3.1HIGH 7.5
  • TI-2025-41097 An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder CVSS 3.1HIGH 7.5
  • TI-2025-01720 Improper Validation of Array Index in ollama/ollama CVSS 3.0HIGH 7.5
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences