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Llama Cpp CVE-2024-42478

MEDIUM
Out-of-bounds Read (CWE-125)
2024-08-12 security-advisories@github.com
5.3
CVSS 3.1 · GitHub Advisory
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Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK

1 technique across 1 tactic: Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.49%.

Exploit ScenarioDerived

A remote attacker could read data from memory outside the intended buffer boundaries by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAI

llama.cpp provides LLM inference in C/C++. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. llama.cpp provides LLM inference in C/C++. The unsafe data pointer member in the rpc_tensor structure can cause arbitrary address reading. This vulnerability is fixed in b3561. Affected products include: Ggml Llama.Cpp.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

DescriptionGitHub Advisory

llama.cpp provides LLM inference in C/C++. The unsafe data pointer member in the rpc_tensor structure can cause arbitrary address reading. This vulnerability is fixed in b3561.

Threat Intelligence Overview

EPSS Score
0.5%
Top 34% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium

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 MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.5%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)GitHub Advisory

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-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

CVE-2026-118375 CRITICAL
9.2 Oct 28

Stack-based out-of-bounds write in llama.cpp's ggml-rpc RDMA receive path (builds b8841 through b11865) lets unauthentic

CVE-2026-43631 CRITICAL
9.2 Aug 06

Remote code execution in llama.cpp's llama-server (builds b7492 through b9060) allows unauthenticated attackers to run a

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