I'll leave the interpretations to the policy people and lawyers, but this week's Linux Foundation statement does not strike me as a generous interpretation of OFAC sanctions.
Presumably, as goes for Linux, so goes for FOSS, broadly.
cc: nprofile1qyt8wumn8ghj7etyv4hzumn0wd68ytnvv9hxgtcpr4mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmp0qqsd3fhv7rped64g77dyf9l7ndmae9mkxdz37099cc6wyzr9jytxg7c0wprx5