Ollama Server Vulnerable to Denial of Service via Crafted GZIP
Ollama
An out-of-memory vulnerability exists in Ollama server where processing a malicious gzip bomb response causes application crashes. The issue stems from unbounded reading of response bodies.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 7.5
- EPSS
- 0.01 · top 46% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 20 Mar 2025
- last update
- 20 Mar 2025
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2025-03-20CVE-2024-12886: Ollama Vulnerable to Denial of Service (DoS) via Crafted GZIPGitHub Advisory Database · github.com/advisories/GHSA-v464-r2r9-www7
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 20 Mar 2025 · first reported 20 Mar 2025
- origin
- GitHub Advisory DatabaseVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 07:00Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# Ollama Server Vulnerable to Denial of Service via Crafted GZIP https://gcdradar.vercel.app/incidents/ollama-server-vulnerable-to-denial-of-service-via-crafted-gz · AIR-2025-0227 · closed 2025-03-20 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2025-03-20 - AI role: Attack on AI - Products: Ollama - CVE ids: CVE-2024-12886 - CVSS: 7.5 ## Summary An out-of-memory vulnerability exists in Ollama server where processing a malicious gzip bomb response causes application crashes. The issue stems from unbounded reading of response bodies. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2025-03-20: CVE-2024-12886: Ollama Vulnerable to Denial of Service (DoS) via Crafted GZIP (https://github.com/advisories/GHSA-v464-r2r9-www7) ## Sources - 2025-03-20 GitHub Advisory Database: CVE-2024-12886: Ollama Vulnerable to Denial of Service (DoS) via Crafted GZIP https://github.com/advisories/GHSA-v464-r2r9-www7 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
Related
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Patch now · Disclosed · since 20 Mar 2025 · CVE-2025-0315
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Patch now · Disclosed · since 20 Mar 2025 · CVE-2024-8063
AI - closed7.5Ollama CVE-2025-0317: Ollama Divide-By-Zero Error Leads to Server Crash
Patch now · Disclosed · since 20 Mar 2025 · CVE-2025-0317
AI - closed7.5Ollama CVE-2025-0312: Ollama Null Pointer Dereference Causes Denial of Service
Patch now · Disclosed · since 20 Mar 2025 · CVE-2025-0312
AI - closed7.5Ollama CVE-2024-12055: Ollama allows out-of-bounds read via crafted GGUF model
Patch now · Disclosed · since 20 Mar 2025 · CVE-2024-12055
AI - closed6.6Ollama CVE-2025-44779: Ollama arbitrary file deletion vulnerability
Patch now · Disclosed · since 7 Aug 2025 · CVE-2025-44779
AI