NULL pointer dereference in Ggml-org Llama.cpp
CVE-2026-70640
llama.cpp builds b1886 through b7445 contain a race condition use-after-free vulnerability in the LLaMA-Android JNI wrapper where bench_1model() and free_1context() lack synchronization, allowing Thread A to operate on freed memory while T…
Vulnerability class: Race Condition
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Ggml-org Llama.cpp — versions b1886, 0.9.0, 5c0d18881e0e9794c96b2602736b758bac9d9388
Weakness classification (CWE)
References
- disclosure@vulncheck.com (related)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-70640?
- CVE-2026-70640 is a high-severity vulnerability in Ggml-org Llama.cpp, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2026-08-06.
- How severe is CVE-2026-70640?
- High severity. CVSS v3 base score is 7.0 out of 10.