CVE-2026-33298

HIGH

llama.cpp has a Heap Buffer Overflow via Integer Overflow in GGUF Tensor Parsing

Title source: cna
STIX 2.1

Description

llama.cpp is an inference of several LLM models in C/C++. Prior to b7824, an integer overflow vulnerability in the `ggml_nbytes` function allows an attacker to bypass memory validation by crafting a GGUF file with specific tensor dimensions. This causes `ggml_nbytes` to return a significantly smaller size than required (e.g., 4MB instead of Exabytes), leading to a heap-based buffer overflow when the application subsequently processes the tensor. This vulnerability allows potential Remote Code Execution (RCE) via memory corruption. b7824 contains a fix.

Scores

CVSS v3 7.8
EPSS 0.0001
EPSS Percentile 2.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-122 CWE-190
Status published
Products (1)
ggml-org/llama.cpp < b7824
Published Mar 24, 2026
Tracked Since Mar 24, 2026