Buffer overflow in Ggml-Org Llama.cpp
CVE-2026-118375
llama.cpp b8841 before b11865 contains an out-of-bounds write vulnerability in the ggml-rpc RDMA transport rdma_recv() function that allows unauthenticated peers to overflow the rpc-server stack. Attackers advertising RDMA capabilities in the HELLO message can send up to 256 KiB into a 1-byte stack variable in rpc_serve_client(), crashing the server or potentially executing code.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (30.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- github.com/ggml-org/llama.cpp/pull/30399 (issue-tracking, patch)
- github.com/ggml-org/llama.cpp/commit/9a0fde9967fa1a35b6e5dd1f47e1a3648b6fecc1 (patch)
- github.com/ggml-org/llama.cpp/blob/620d2225cc436ab0b001e3200e590e3b286ef9ab/ggm… (technical-description)
- github.com/ggml-org/llama.cpp/releases/tag/b11865 (release-notes)
- github.com/ggml-org/llama.cpp (product)
- www.vulncheck.com/advisories/llama-cpp-b8841-before-b11865-stack-based-buffer-o… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-118375?
- CVE-2026-118375 is a high-severity vulnerability in Ggml-Org Llama.cpp, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2026-10-28.
- How severe is CVE-2026-118375?
- High severity. CVSS v3 base score is 8.1 out of 10.