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CVE-2026-43622— llama.cpp b1886–b7445 Double Free via llama-android.cpp

Quick assessment

Affected
ggml-org llama.cpp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ggml llama.cpp是ggml组织的一个在本地执行大语言模型推理的引擎。 ggml llama.cpp b1886版本至b7445版本存在资源管理错误漏洞，该漏洞源于LLaMA-Android JNI包装器中new_1batch()函数使用malloc()分配内存而free_1batch()函数使用C++ delete运算符释放，导致双重释放和堆元数据损坏，攻击者可利用该问题导致进程崩溃的拒绝服务，或根据分配器状态实现任意代码执行。

CVSS 7.8 · High EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 3

VendorProduct Version RangeStatus
ggml-org llama.cpp b1886≤ b7445 affected
0.9.0≤ 0.17.1 affected
5c0d18881e0e9794c96b2602736b758bac9d9388 unaffected
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I. Basic Information for CVE-2026-43622

Vulnerability Information
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Vulnerability Title
llama.cpp b1886–b7445 Double Free via llama-android.cpp
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不匹配的内存管理例程
Source: CVE Program / CVE List V5
Vulnerability Title
ggml llama.cpp 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ggml llama.cpp是ggml组织的一个在本地执行大语言模型推理的引擎。 ggml llama.cpp b1886版本至b7445版本存在资源管理错误漏洞，该漏洞源于LLaMA-Android JNI包装器中new_1batch()函数使用malloc()分配内存而free_1batch()函数使用C++ delete运算符释放，导致双重释放和堆元数据损坏，攻击者可利用该问题导致进程崩溃的拒绝服务，或根据分配器状态实现任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ggml-org llama.cpp b1886 ~ b7445 -

II. Public POCs for CVE-2026-43622

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9763 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-43622

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Patches & Fixes for CVE-2026-43622 (1)

Vendor Advisories for CVE-2026-43622 (1)

Vendor Pages for CVE-2026-43622 (1)

Same Patch Batch · ggml-org · 2026-08-06 · 10 CVEs total

CVE-2026-43632 8.1 HIGH llama.cpp b7492–b9060 Use-After-Free in Tokenization Endpoints
CVE-2026-43631 8.1 HIGH llama.cpp b7492–b9060 Use-After-Free RCE via llama-server
CVE-2026-43629 8.1 HIGH llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore
CVE-2026-43627 7.8 HIGH llama.cpp b1283–b9058 Integer Overflow in llama_batch_init() Function
CVE-2026-43628 7.8 HIGH llama.cpp b3978–b9058 Integer Underflow via DRY Sampler
CVE-2026-70638 7.8 HIGH llama.cpp b1886–b7445 Integer Overflow via new_1batch() in llama-android.cpp
CVE-2026-70640 7.0 HIGH llama.cpp b1886–b7445 Race Condition Use-After-Free via llama-android.cpp
CVE-2026-43630 6.5 MEDIUM llama.cpp b5702–b7653 Out-of-Bounds Read Information Disclosure
CVE-2026-70639 5.5 MEDIUM llama.cpp b1886–b7445 Null Pointer Dereference DoS via llama-android.cpp

IV. Related Vulnerabilities

Same product: llama.cpp
Same vendor: ggml-org
Same weakness: CWE-762

V. Comments for CVE-2026-43622

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