OSV-2024-1218 UNKNOWN READ in Poco::UTF16Encoding::queryConvert

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=372765426 Crash type: UNKNOWN READ Crash state: Poco::UTF16Encoding::queryConvert Poco::TextConverter::convert Poco::Net::NTLMCredentials::parseChallengeMessage...