UK context:

Device manufacturers would likely also have to notify the government before making available important security updates that fix known vulnerabilities and keep devices secure. Accordingly, the Secretary of State, upon receiving such an advance notice, could now request operators to, for instance, abstain from patching security gaps to allow the government to maintain access for surveillance purposes. 

https://www.justsecurity.org/87615/changes-to-uk-surveillance-regime-may-violate-international-law/