---
id: CVE-2026-70639
title: >-
  llama.cpp builds b1886 through b7445 contain a null pointer dereference
  vulnerability in the LLaMA-Android JNI wrapper where the bench_1model()
  function fails to validate the model context pointer before dereferencing it
summary: >-
  llama.cpp builds b1886 through b7445 contain a null pointer dereference
  vulnerability in the LLaMA-Android JNI wrapper where the bench_1model()
  function fails to validate the model context pointer before dereferencing it.
  Attackers can s…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: ggml
product: llama.cpp
affected:
  - 'llama.cpp >= b1886, <= b7445'
published: '2026-08-06'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T18:10:56.197'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70639'
references:
  - url: 'https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ggml-org/llama.cpp/releases/tag/b7446'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-null-pointer-dereference-dos-via-llama-android-cpp
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00195
epssPercentile: 0.08155
ingestedAt: '2026-09-21T18:50:57.547Z'
---

## Overview

llama.cpp builds b1886 through b7445 contain a null pointer dereference vulnerability in the LLaMA-Android JNI wrapper where the bench_1model() function fails to validate the model context pointer before dereferencing it. Attackers can supply a malicious, corrupt, or truncated model file to trigger a null context condition, causing a SIGSEGV crash that terminates the Android application process and results in denial of service.

## Affected

- `llama.cpp >= b1886, <= b7445`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.