NULL pointer dereference in Ggml Llama.cpp
CVE-2026-70639
llama.cpp builds b1886 through b7445 contain a null pointer dereference vulnerability in the LLaMA-Android JNI wrapper where the bench_1model() function fails to validate the model context pointer before dereferencing it. Attackers can supply a malicious, corrupt, or truncated model file to trigger a null context condition, causing a SIGSEGV crash that terminates the Android application process and results in denial of service.
EPSS: 0.001 (3.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Ggml Llama.cpp
- Ggml-org Llama.cpp — versions b1886, 0.9.0, 5c0d18881e0e9794c96b2602736b758bac9d9388
Weakness classification (CWE)
References
- disclosure@vulncheck.com (related, Patch, Third Party Advisory)
- disclosure@vulncheck.com (Patch, patch)
- disclosure@vulncheck.com (release-notes, Patch, Release Notes, Vendor Advisory)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-70639?
- CVE-2026-70639 is a medium-severity vulnerability in Ggml Llama.cpp, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-08-06.
- How severe is CVE-2026-70639?
- Medium severity. CVSS v3 base score is 5.5 out of 10.