A heap overflow in apk (Alpine Linux's package manager) allows a remote attacker to cause a denial of service, or achieve code execution by crafting a malicious APKINDEX.tar.gz file.
https://www.twistlock.com/2017/06/25/alpine-linux-vulnerability-discovery-code-execution-pt-1-2/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-18600