Apple on Thursday released fixes for two critical zero-day vulnerabilities in iPhones, iPads, and Macs that give hackers dangerous access to the internals of the OSes the devices run on.

Apple credited an anonymous researcher with discovering both vulnerabilities. The first vulnerability, CVE-2022-22675, resides in macOS for Monterey and in iOS or iPadOS for most iPhone and iPad models. The flaw, which stems from an out-of-bounds write issue, gives hackers the ability to execute malicious code that runs with privileges of the kernel, the most security-sensitive region of the OS. CVE-2022-22674, meanwhile, also results from an out-of-bounds read issue that can lead to the disclosure of kernel memory.