CVE-2026-43622

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches	Patch Third Party Advisory
https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388	Patch
https://github.com/ggml-org/llama.cpp/releases/tag/b7446	Patch Release Notes Vendor Advisory
https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-double-free-via-llama-android-cpp	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*

History

23 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Las compilaciones b1886 a b7445 de llama.cpp contienen una vulnerabilidad de doble liberación en el wrapper JNI de LLaMA-Android donde new_1batch() asigna memoria usando malloc() mientras que free_1batch() la desasigna usando el operador delete de C++, causando corrupción de metadatos del heap. Los atacantes pueden activar esta inconsistencia en la gestión de memoria para causar denegación de servicio a través de fallos del proceso o potencialmente lograr ejecución de código arbitrario dependiendo del estado del asignador.

Information

Published : 2026-08-06 16:16

Updated : 2026-10-29 21:17

NVD link : CVE-2026-43622

Mitre link : CVE-2026-43622

CVE.ORG link : CVE-2026-43622

JSON object : View

Products Affected

ggml

llama.cpp

CWE

CWE-415

Double Free

CWE-762

Mismatched Memory Management Routines

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