CVE-2026-43622

Process crash via mismatched JNI deallocation

Published Aug 6, 2026 · Updated Aug 6, 2026

Double free in the LLaMA-Android JNI wrapper in llama.cpp 0.9.0 through 0.17.1 allows attackers to crash the process locally. The new_1batch() function allocates batch storage with malloc(), but free_1batch() releases the same storage with the incompatible C++ delete operator, corrupting heap metadata. Triggering requires local access and user interaction; allocator state determines whether corruption stops at a crash or permits arbitrary code execution.

CVSS severity8.5
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Double free in the LLaMA-Android JNI wrapper in llama.cpp 0.9.0 through 0.17.1 allows attackers to crash the process locally. The new_1batch() function allocates batch storage with malloc(), but free_1batch() releases the same storage with the incompatible C++ delete operator, corrupting heap metadata. Triggering requires local access and user interaction; allocator state determines whether corruption stops at a crash or permits arbitrary code execution.

The record

CVE
CVE-2026-43622
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Georgi Gerganov
Product
llama.cpp
Classifications
CWE-762, CWE-415, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.9.0 <=0.17.1
  2. Affected versionversion=b1886 <=b7445

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Georgi Gerganov · llama.cppversion=0.9.0 <=0.17.1; version=b1886 <=b7445

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-762Mismatched Memory Management Routines
CWE-415Double Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo