The MIT Technology Review has posted an
article on a program within the US Defense Advanced Research Projects
Agency to identify threats to open-source code.

The ultimate goal is to detect and counteract any malicious
campaigns to submit flawed code, launch influence operations,
sabotage development, or even take control of open-source projects.
To do this, the researchers will use tools such as sentiment
analysis to analyze the social interactions within open-source
communities such as the Linux kernel mailing list, which should
help identify who is being positive or constructive and who is
being negative and destructive.

Source: LWN.net – The US military wants to understand the most important software on Earth (MIT
Technology Review)