CVE-2026-70638

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.

Weakness classification

• disclosure@vulncheck.com: CWE-122

Primary references

• disclosure@vulncheck.com — Patch, Third Party Advisory
• disclosure@vulncheck.com — Patch
• disclosure@vulncheck.com — Patch, Release Notes, Vendor Advisory
• disclosure@vulncheck.com — Third Party Advisory