The Snappy frame decoder function doesn't restrict the chunk length which may lead to excessive memory usage. Beside this it also may buffer reserved skippable chunks until the whole chunk was received which may lead to excessive memory usa…

{
                    "vendor": "The Netty project",
                    "product": "Netty",
                    "versions": [
                        {
                            "version": "unspecified",
                            "lessThan": "4.1.68Final",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ]
                }