CVE-2026-34159

Published Apr 1, 2026

Last updated 20 days ago

CVSS critical 9.8
C++

Overview

Description
llama.cpp is an inference of several LLM models in C/C++. Prior to version b8492, the RPC backend's deserialize_tensor() skips all bounds validation when a tensor's buffer field is 0. An unauthenticated attacker can read and write arbitrary process memory via crafted GRAPH_COMPUTE messages. Combined with pointer leaks from ALLOC_BUFFER/BUFFER_GET_BASE, this gives full ASLR bypass and remote code execution. No authentication required, just TCP access to the RPC server port. This issue has been patched in version b8492.
Source
security-advisories@github.com
NVD status
Analyzed
Products
llama.cpp

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

security-advisories@github.com
CWE-119

Social media

Hype score
Not currently trending

  1. CRITICAL: CVE-2026-34159 (CVSS 9.8) — ggml llama.cpp. CVE: CVE-2026-34159 CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity: CRITICAL Status: Critical advisory

    @lyrie_ai

    12 May 2026

    41 Impressions

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Configurations

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References

Sources include official advisories and independent security research.