Buffer overflow in Ggml-Org Llama.cpp
CVE-2026-116096
A weakness has been identified in ggml-org llama.cpp. Affected by this issue is the function list_pockettts_state_slots of the file tools/mtmd/models/pockettts-gen.cpp of the component Pocket-TTS. This manipulation of the argument mmproj causes out-of-bounds write. The attack requires local access. The exploit has been made available to the public and could be used for attacks. Upgrading to version b11796 can resolve this issue. Patch name: 0a1ef309cdbb9f2024f58a38fb4c42352c5db569. The affected component should be upgraded. The reported heap out‑of‑bounds write (gen‑audio / pocket‑tts state_out path) is no longer a silent exploitable heap write on current master and the latest release b11871 - a malicious mmproj that previously triggered it now trips a release‑active GGML_ASSERT and aborts. But the submitter's recommended by‑construction fix (PR #29360 "prevent OOB accesses from malformed mmproj files") is still open. So the root cause is detected‑and‑aborted, not prevented‑by‑design.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Ggml-Org Llama.cpp — versions 0.17.1, 0.4.0, 55abc39
Weakness classification (CWE)
References
- github.com/3em0/cve_repo/tree/main/2026/llama.cpp.pockettts_state_heap_oob_rce (exploit)
- github.com/3em0/cve_repo/tree/main/2026/llama.cpp.pockettts_state_heap_oob_rce/… (exploit)
- github.com/ggml-org/llama.cpp/ (product)
- github.com/ggml-org/llama.cpp/commit/0a1ef309cdbb9f2024f58a38fb4c42352c5db569 (patch)
- github.com/ggml-org/llama.cpp/pull/30902 (issue-tracking, patch)
- github.com/ggml-org/llama.cpp/releases/tag/b11796 (patch)
- vuldb.com/cve/CVE-2026-116096 (third-party-advisory)
- vuldb.com/submit/1000891 (third-party-advisory)
- vuldb.com/vuln/426164 (technical-description, vdb-entry)
- vuldb.com/vuln/426164/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-116096?
- CVE-2026-116096 is a medium-severity vulnerability in Ggml-Org Llama.cpp, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-10-25.
- How severe is CVE-2026-116096?
- Medium severity. CVSS v3 base score is 5.3 out of 10.