CVE-2026-17500 ggml-org llama.cpp json-schema-to-grammar.cpp _visit_pattern null pointer dereference

A vulnerability was detected in ggml-org llama.cpp d006858/e15efe0. This affects the function visitpattern of the file common/json-schema-to-grammar.cpp. The manipulation results in null pointer dereference. The attack can be launched remotely. The pull request to fix this issue awaits acceptance...