Benjamin Carr, Ph.D. 👨🏻💻🧬<p>We call this kernel saunters: How Apple rearranged its <a href="https://hachyderm.io/tags/XNU" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XNU</span></a> with exclaves<br>Based on the references to exclaves in XNU source for <a href="https://hachyderm.io/tags/Apple" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Apple</span></a>'s M4 chips and the A18 used in iPhone 16, source argues exclaves form the basis of a significant redesign of XNU's security model.<br>"In iOS 18, exclaves refer to specific resources that are separated from the main iOS kernel (XNU) and cannot be accessed by it, even if the kernel is compromised," the researcher explained in a document. <br><a href="https://www.theregister.com/2025/03/08/kernel_sanders_apple_rearranges_xnu/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">theregister.com/2025/03/08/ker</span><span class="invisible">nel_sanders_apple_rearranges_xnu/</span></a></p>