Vulnerability · Published Aug 6, 2026 · Assigned by VulnCheck
CVE-2026-70639llama.cpp b1886–b7445 Null Pointer Dereference DoS via llama-android.cpp
Medium 5.5
In plain English
A medium-severity null pointer dereference in llama.cpp from ggml-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | llama.cpp | 7593+dfsg-1 | DEBIAN-CVE-2026-70639 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://github.com/ggml-org/llama.cpp/releases/tag/b7446 release-notes
- https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388 patch
- https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches related
- https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-null-pointer-dereference-dos-via-llama-android-cpp third-party-advisory