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Vulnerabilities CVE-2026-70638

CVE-2026-70638

High
Open
TLP:CLEAR

llama.cpp b1886–b7445 Integer Overflow via new_1batch() in llama-android.cpp

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Description

llama.cpp builds b1886 through b7445 contain an integer overflow vulnerability in the LLaMA-Android JNI wrapper where the new_1batch() function multiplies sizeof(llama_seq_id) by an attacker-controlled n_seq_max parameter without overflow validation, causing heap buffer allocation to wrap and allocate insufficient memory. Attackers can exploit this by providing a crafted n_seq_max value through a malicious model file or JNI call to trigger heap corruption and achieve denial of service or arbitrary code execution on Android applications using the LLaMA-Android binding.

Details

CVSS Score
8.5
EPSS Score
0.13%

3.3th percentile

CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 6, 2026
Last Modified
Aug 7, 2026
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