Vulnerability · Published Aug 6, 2026 · Assigned by VulnCheck
CVE-2026-43622llama.cpp b1886–b7445 Double Free via llama-android.cpp
High 7.8
In plain English
A high-severity double free 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 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
llama.cpp builds b1886 through b7445 contain a double free vulnerability in the LLaMA-Android JNI wrapper where new_1batch() allocates memory using malloc() while free_1batch() deallocates it using the C++ delete operator, causing heap metadata corruption. Attackers can trigger this memory management mismatch to cause denial of service through process crashes or potentially achieve arbitrary code execution depending on allocator state.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | llama.cpp | 7593+dfsg-1 | DEBIAN-CVE-2026-43622 |
Affected products (as reported)
Weakness: CWE-762, CWE-415 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-double-free-via-llama-android-cpp third-party-advisory