---
id: CVE-2026-43622
title: >-
  llama.cpp builds b1886 through b7445 contain a double free vulnerability in
  the LLaMA-Android JNI wrapper where new_1batch() allocates memory using
  malloc() while free_1batch() deallocates it using the C++ delete operator,
  causing heap m…
summary: >-
  llama.cpp builds b1886 through b7445 contain a double free vulnerability in
  the LLaMA-Android JNI wrapper where new_1batch() allocates memory using
  malloc() while free_1batch() deallocates it using the C++ delete operator,
  causing heap m…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-415
  - CWE-762
vendor: ggml
product: llama.cpp
affected:
  - 'llama.cpp >= b1886, <= b7445'
published: '2026-08-06'
updated: '2026-09-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43622'
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-double-free-via-llama-android-cpp
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00156
epssPercentile: 0.05137
ingestedAt: '2026-09-05T15:41:16.525Z'
---

## Overview

llama.cpp builds b1886 through b7445 contain a double free vulnerability in the LLaMA-Android JNI wrapper where new_1batch() allocates memory using malloc() while free_1batch() deallocates it using the C++ delete operator, causing heap metadata corruption. Attackers can trigger this memory management mismatch to cause denial of service through process crashes or potentially achieve arbitrary code execution depending on allocator state.

## Affected

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

## Remediation

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