A brand new iOS customization app, dirtyZero, developed by Skadz, was released. It’s based on a newly released iOS exploit (CVE-2025-24203) by Ian Beer of Google Project Zero.

The application allows you to hide the home bar and hide the dock on iOS 16.0 all the way up to iOS 18.3.2 on all devices, providing a degree of customization akin to jailbreak tweaks without being jailbroken.

What is dirtyZero?

The dirtyZero is a free and open-source iOS customization tool that enables you to hide the home bar and the dock on iOS 16.0 – 18.3.2 without being jailbroken.

The app helps you easily customize your iOS device without having to worry about jailbreak tools, jailbreak detection, or tweaks.

iOS 18.4 is not supported because the vulnerability has presumably been patched by Apple.

Here’s the full iOS compatibility chart:

Download dirtyZero IPA

You can download the IPA file for the dirtyZero customization app below. Since the app is completely free and open-source, you can also compile it yourself if you prefer.

You can sideload the IPA file with your favorite iOS sideloading tools such as AltStore, Sideloadly, Feather, ESign, etc.

Once installed, the application should be available on your Home Screen. The user interface is easy to use and has only 3 buttons:

• Hide the dock
• Hide the home bar
• Custom Path

Under the buttons, you can find a text console that displays the exploit status for debugging purposes. It also displays the device info, such as the model and current iOS version.

From my testing, the exploit is reliable enough. The app works well, however, a significant drawback is that you have to manually respring the device after you apply tweaks for them to take effect. I detail the methods for manual respring below.

How to manually respring iOS to apply the tweaks?

Due to the limitations of the exploit used, you need to manually respring the device for tweaks to take effect. There are two ways of doing that:

1. Change the device language back and forth (this makes the device respring).
2. Change the Display Zoom setting in Settings -> Display & Brightness.

For the second option, just switch between the two options: Standard vs Bigger Text. You can revert to your preferred one immediately.

How dirtyZero Uses the CVE-2025-24203 Exploit to Customize iOS

This customization tool for iOS is based on the recently released CVE-2025-24203 vulnerability discovered by Ian Beer of Google Project Zero, which was presumably patched in iOS 18.4.

The CVE-2025-24203 vulnerability exploits a bug in Apple’s XNU kernel virtual memory (VM) subsystem, particularly the VM_BEHAVIOR_ZERO_WIRED_PAGES flag, which can be set by any process on its own vm_map_entry.

Once set, and under the right conditions, it causes physical memory pages to be zeroed, even if the process shouldn’t be allowed to modify those pages (e.g., they back a read-only, root-owned file).

1. The app opens a root-owned, read-only file and uses mmap() to map a page.
2. It marks the vm_entry for that page with VM_BEHAVIOR_ZERO_WIRED_PAGES.
3. The page is wired into memory using mlock() (unprivileged).
4. The page is then deallocated using mach_vm_deallocate(), triggering cleanup.

During the cleanup phase of the exploit:

• The page is looked up with VM_PROT_NONE, bypassing write checks.
• If the zero_wired_pages flag is set, the page is zeroed via pmap_zero_page().

The physical memory backing the file is now zeroed without write permissions, and you can modify protected files. It’s quite a clever exploit.

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