CVE-2025-15514Public exploitNetwork attack vectorHinoki check available

Remote runner crash via unchecked bitmap initialization

Published Jan 12, 2026 · Updated Jan 12, 2026

Null pointer dereference in Ollama 0.11.5-rc0 through 0.13.5 allows remote attackers to crash a model runner via the chat API. The multimodal path passes decoded base64 image bytes to mtmd_helper_bitmap_init_from_buf and dereferences its NULL result for invalid media. An unauthenticated crafted request causes a segmentation fault, leaving the selected model unavailable until the runner restarts.

CVSS severity8.7
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Null pointer dereference in Ollama 0.11.5-rc0 through 0.13.5 allows remote attackers to crash a model runner via the chat API. The multimodal path passes decoded base64 image bytes to mtmd_helper_bitmap_init_from_buf and dereferences its NULL result for invalid media. An unauthenticated crafted request causes a segmentation fault, leaving the selected model unavailable until the runner restarts.

The record

CVE
CVE-2025-15514
Published
Jan 12, 2026
Updated
Jan 12, 2026
Vendor
Ollama
Product
Ollama
Classifications
CWE-395, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v0.11.5-rc0 <=0.13.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ollama · Ollamaversion=v0.11.5-rc0 <=0.13.5

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-395Use of NullPointerException Catch to Detect NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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