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Llama Cpp CVE-2024-32878

HIGH
Missing Initialization of a Variable (CWE-456)
2024-04-26 security-advisories@github.com
8.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
Impact

CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.7% exploitation probability (EPSS)

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AnalysisAI

Llama.cpp is LLM inference in C/C++. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-456. Llama.cpp is LLM inference in C/C++. There is a use of uninitialized heap variable vulnerability in gguf_init_from_file, the code will free this uninitialized variable later. In a simple POC, it will directly cause a crash. If the file is carefully constructed, it may be possible to control this uninitialized value and cause arbitrary address free problems. This may further lead to be exploited. Causes llama.cpp to crash (DoS) and may even lead to arbitrary code execution (RCE). This vulnerability has been patched in commit b2740. Affected products include: Ggml Llama.Cpp.

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Severity by source

NVD PRIMARY 8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

Llama.cpp is LLM inference in C/C++. There is a use of uninitialized heap variable vulnerability in gguf_init_from_file, the code will free this uninitialized variable later. In a simple POC, it will directly cause a crash. If the file is carefully constructed, it may be possible to control this uninitialized value and cause arbitrary address free problems. This may further lead to be exploited. Causes llama.cpp to crash (DoS) and may even lead to arbitrary code execution (RCE). This vulnerability has been patched in commit b2740.

Threat Intelligence Overview

EPSS Score
0.7%
Top 51% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.7%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

45
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*
CVE-2024-42479 CRITICAL POC
10.0 Aug 12

Arbitrary memory write in llama.cpp's RPC server allows remote unauthenticated attackers to corrupt arbitrary memory add

CVE-2024-21802 HIGH POC
8.8 Feb 26

Remote code execution in llama.cpp (commit 18c2e17) is possible when a user opens a malicious .gguf model file, triggeri

CVE-2026-21869 HIGH POC
8.8 Jan 08

Llama.cpp server endpoints fail to validate the n_discard parameter from JSON input, allowing negative values that trigg

CVE-2024-21825 HIGH POC
8.8 Feb 26

Remote code execution in llama.cpp (commit 18c2e17) is possible when a victim loads a malicious .gguf model file, trigge

CVE-2024-23605 HIGH POC
8.8 Feb 26

Remote code execution in llama.cpp (GGUF library) allows attackers to achieve arbitrary code execution by tricking a use

CVE-2024-23496 HIGH POC
8.8 Feb 26

Remote code execution in llama.cpp (commit 18c2e17) occurs when the GGUF library's gguf_fread_str function parses a mali

CVE-2024-21836 HIGH POC
8.8 Feb 26

Heap-based buffer overflow in llama.cpp's GGUF library header parser (commit 18c2e17) enables code execution when a vict

CVE-2025-52566 HIGH POC
8.6 Jun 24

CVE-2025-52566 is a signed vs. unsigned integer overflow vulnerability in llama.cpp's tokenizer (llama_vocab::tokenize f

CVE-2026-34159 CRITICAL
9.8 Apr 01

Remote code execution in llama.cpp RPC backend allows unauthenticated attackers with TCP access to achieve arbitrary mem

CVE-2024-42478 MEDIUM POC
5.3 Aug 12

llama.cpp provides LLM inference in C/C++. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable,

CVE-2026-39909 CRITICAL
9.2 Aug 21

Remote code execution in llama.cpp (ggml-org) prior to build b8585 arises from a use-after-free in the RPC server's GRAP

CVE-2026-43629 CRITICAL
9.2 Aug 06

Heap buffer overflow in llama.cpp's server KV cache state-restore path (builds b4882 through b9058) lets an attacker who

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