| Component | llama.cpp |
| Severity | high (CVSS 7.8) |
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-08-06 |
| Last modified | 2026-09-21 |
| Affected versions | llama.cpp >= b1283, <= b9058 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-190CWE-680 |
| CISA KEV | not listed |
NVD description
llama.cpp builds b1283 through b9058 contain an integer overflow vulnerability in the llama_batch_init() function where unchecked multiplications in malloc() calls can wrap past INT32_MAX when computing allocation sizes. Attackers can pass specially crafted parameters to trigger integer overflow, causing heap corruption and potentially achieving arbitrary code execution through subsequent batch operations that write past allocated buffer boundaries.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep llama.cpp off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-43627
- https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches
- https://www.vulncheck.com/advisories/llama-cpp-b1283-b9058-integer-overflow-in-llama-batch-init-function
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