CVE-2026-70639
llama.cpp b1886–b7445 Null Pointer Dereference DoS via llama-android.cpp
- State
- Published
- Severity
- 6.8 Medium
- Published
- Aug 6, 2026
- Updated
- Oct 29, 2026
- Reserved
- Aug 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
llama.cppggml-org |
|
References
- https://github.com/ggml-org/llama.cpp/releases/tag/b7446release-notes
- https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388patch
- https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patchesrelated
- https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-null-pointer-dereference-dos-via-llama-android-cppthird-party-advisory
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