Bitcoin Core 0.14.x before 0.14.3, 0.15.x before 0.15.2, and 0.16.x before 0.16.3 and Bitcoin Knots 0.14.x through 0.16.x before 0.16.3 allow a remote denial of service (application crash) exploitable by miners via duplicate input. An attacker can make bitcoind or Bitcoin-Qt crash.
https://github.com/bitcoinknots/bitcoin/blob/v0.16.3.knots20180918/doc/release-notes.md
https://github.com/bitcoin/bitcoin/blob/v0.16.3/doc/release-notes.md
https://github.com/JinBean/CVE-Extension
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2018-17144