CVE-2024-21836: llama.cpp heap-based buffer overflow in tensor headers
llama.cpp
A heap-based buffer overflow vulnerability exists in the header tensor parsing functionality of llama.cpp. Attackers can trigger this flaw via a malicious GGUF file to achieve code execution.
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
- 8.8
- EPSS
- 0.01 · top 29% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 26 Feb 2024
- last update
- 26 Feb 2024
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2024-02-26CVE-2024-21836: A heap-based buffer overflow vulnerability exists in the GGUF library header.n_tensors functionality of llama.cpp Commit 18c2e17.NVD · nvd.nist.gov/vuln/detail/CVE-2024-21836
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Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling, Open-weight model
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 26 Feb 2024 · first reported 26 Feb 2024
- origin
- NVDVulnerability 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 10:04Z · updated 2026-10-18 10:04Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
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the brief as text
# CVE-2024-21836: llama.cpp heap-based buffer overflow in tensor headers https://gcdradar.vercel.app/incidents/cve-2024-21836-llama-cpp-heap-based-buffer-overflow-in-tenso · AIR-2024-0211 · closed 2024-02-26 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2024-02-26 - AI role: Attack on AI - Products: llama.cpp - CVE ids: CVE-2024-21836 - CVSS: 8.8 ## Summary A heap-based buffer overflow vulnerability exists in the header tensor parsing functionality of llama.cpp. Attackers can trigger this flaw via a malicious GGUF file to achieve code execution. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2024-02-26: CVE-2024-21836: A heap-based buffer overflow vulnerability exists in the GGUF library header.n_tensors functionality of llama.cpp Commit 18c2e17. (https://nvd.nist.gov/vuln/detail/CVE-2024-21836) ## Sources - 2024-02-26 NVD: CVE-2024-21836: A heap-based buffer overflow vulnerability exists in the GGUF library header.n_tensors functionality of llama.cpp Commit 18c2e17. https://nvd.nist.gov/vuln/detail/CVE-2024-21836 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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