PS5 Hypervisor Exploit in 2025: Real XOM Bypass Guide

Quick Answer: The Byepervisor Reborn ps5 hypervisor exploit leverages an S3 rest-mode race condition in firmware 6.xx through 13.60. By abusing insecure Nested Page Table (NPT) configurations during multi-processor initialization hypercalls, developers gain arbitrary hypervisor read/write permissions, successfully defeating Execute-Only Memory (XOM) and unmapping kernel write protections across non-Pro and PS5 Pro consoles.

Defeated hypervisor security on PlayStation 5 hardware has long been considered the final frontier for custom homebrew execution. The recent release of Byepervisor Reborn proves that Sony's virtualization layer still harbors critical architectural flaws. If you have followed public PlayStation security research since early AMD-V hypervisor write-ups, this tool represents a massive step forward. Here is how the underlying rest-mode exploit operates, why physical memory layouts on new hardware revisions matter, and how developers can utilize this payload safely.

The S3 Rest-Mode Vulnerability: How startup_mp Breaks Security

Most modern virtualization security models assume that the transition between system sleep and full-power states maintains identical access control boundaries. On the PS5, the kernel relies on AMD-V virtualization primitives to isolate privileged hypervisor operations from standard kernel-mode operations. However, power management exposes a unique attack surface during the S3 power-state resume sequence.

When waking the system from rest mode, the primary processor (Core 0) issues the startup_mp hypercall to bring Application Processors (APs 1 through 15) back online. This hypercall requires a reset vector argument—passed via the instruction pointer register (rip)—which dictates where these secondary cores begin execution upon initialization.

During this hypercall processing window, an insecure nested page tables amd-v configuration is momentarily applied to cores 1–15. By intercepting this specific state transition, a user-land payload running with preliminary kernel read/write primitives can execute arbitrary supervisor-mode shellcode. This shellcode acquires direct read and write access to the hypervisor address space, including the Virtual Machine Control Blocks (VMCBs) that govern hardware virtualization rules.

When this race window opens, you are effectively operating outside the normal security checks imposed by the host operating system. That said, there's a real catch here: timing is everything. If the payload fails to align memory mappings before the hypervisor locks down the AP cores, the console experiences an immediate panic and powers down.

Defeating XOM and Kernel Write Protections

Sony introduced Execute-Only Memory (XOM), often styled as xotext, to prevent kernel memory dumping even when an attacker achieves standard kernel read/write status. Under normal conditions, attempting to read code sections in the kernel results in a page fault triggered at the hardware level.

Byepervisor Reborn completely neutralizes this protection. By modifying the Nested Page Tables directly from within the compromised hypervisor context, the payload clears the execute-only flags and sets the write-enable bits across the kernel's .text segment.

If you want to know how to disable ps5 xom protection, the process involves three precise operations:

1. Locate the physical target address for the active VM Control Block (VMCB).
2. Rewrite the Nested Page Table entries governing kernel virtual addresses to allow read access.
3. Modify system register masks to prevent hardware re-locking during normal execution context switches.

Upon a successful resume cycle, the payload displays an on-screen system notification showing the first 8 bytes of the decrypted kernel text segment (0x41 0x57 0x41 0x56 0x41 0x54 0x53 0x55 or 41 57 41 56 corresponding to standard AMD64 function prologues). This visual readout acts as definitive confirmation that XOM has been defeated and that hypervisor enforcement is suspended.

This next part matters more than it looks: defeating XOM does not automatically give you a usable environment for homebrew games or persistent modifications. It simply exposes the bare kernel text so you can extract gadgets and build functional patches manually.

Hardware Differences: PS5 Standard vs. PS5 Pro Physical Addresses

One major pitfall practitioners face when deploying hypervisor-level code across different console revisions is physical memory layout shifting. Sony modified the hardware architecture for the PS5 Pro by adding 2GB of additional DDR5 memory. While standard consumers only care about frame rates, security developers must account for shifted physical memory maps.

Sony assigned this additional 2GB chunk directly to the hypervisor space. As a result, hardcoded physical address offsets designed for original base models fail catastrophically on Pro hardware.

Standard Base Models (CFI-1000/1100/1200):  0x062800000 PA
PS5 Pro Models (CFI-7000 series):            0x8E0800000 PA

The byepervisor reborn payload automatically checks hardware identifiers during initialization to resolve the correct base address. If the system misidentifies your physical platform, the console shuts off instantly upon resuming from rest mode.

Here is a comparison of execution environments between standard hardware and Pro hardware setups:

If your console displays an unhandled error hex code inside square brackets during notification output, you are dealing with a physical address mismatch. You will need to override the physical base check in paging.c before recompiling the payload.

Build System and Execution Flow via elfldr

To build and deploy Byepervisor Reborn, you need a properly configured PS5-Payload-Dev SDK environment. The project uses a multi-stage compilation pipeline where code inside the break_hv_payload/ subdirectory is built as a minimal flat binary designed to run directly inside supervisor/kernel space.

Here is the step-by-step pipeline required to deploy the ps5 firmware 13.60 jailbreak component:

1. Environment Setup: Ensure PS5_PAYLOAD_SDK is exported in your terminal path.
2. Payload Compilation: Run make inside the root repository. This generates byepervisor.elf alongside the embedded flat binary.
3. Power Setting Adjustment: On your PS5 console, navigate to Settings -> System -> Power Saving -> Features Available in Rest Mode and set Supply Power to USB Ports to Always.
4. Kernel Entry: Execute your primary userland/kernel entry point (such as a WebKit or font-based entry chain) to load elfldr on port 9021.
5. Payload Injection: Send byepervisor.elf over netcat to port 9021.
6. Rest Mode Trigger: Put the console into Rest Mode via the power menu after receiving the initial injection notification.
7. Resume Cycle: Wake the console using the controller. The payload resumes execution, patches NPTs, and displays the success notification.

# Example deployment command from a Linux build host
nc -w 3 192.168.1.150 9021 < byepervisor.elf

It is vital that you do not force-close elfldr prior to putting the system to sleep. The payload actively hook-registers its resume handler inside the system power daemon, relying on elfldr persistence to retain valid physical memory pointers across the S3 cycle.

Adding Custom Firmware Offsets and Patching Constraints

Out of the box, Byepervisor Reborn fully supports firmwares 13.00, 13.20, and 13.60. While the underlying vulnerability exists natively on firmwares as low as 6.xx, running it on unlisted builds requires adding custom offset definitions to the project source.

When porting to an unsupported build, developers must define kernel symbol locations inside include/offsets/. You must modify three main functions across the codebase to handle new system builds correctly:

• kgadget(): Maps required kernel ROP/COP gadgets.
• kdlsym(): Resolves dynamic kernel symbols at runtime.
• rawoff(): Defines raw kernel text offset calculations.

Here is where most guides go wrong: they assume offset porting is purely mechanical. In reality, older firmwares like 6.50 lack specific kernel gadgets that 13.xx relies on for memory context switching. For legacy targets, you must rewrite the payload's gadget resolution paths to use alternative instructions.

Furthermore, this repository is explicitly designed as a developer base. It ships without custom Homebrew Enabler (HEN) patches, kernel debuggers, or bypasses for optical disc drive validation. You are expected to bring your own post-exploitation patches once the write-primitive is established.

Frequently Asked Questions

What is the primary bug used in the ps5 hypervisor exploit?

The exploit takes advantage of a flaw in the startup_mp hypercall triggered during S3 rest-mode resume. When Core 0 initializes Application Processors 1 through 15, an insecure Nested Page Table (NPT) configuration briefly exposes the hypervisor address space to manipulation by kernel-level shellcode.

How to fix ps5 hypervisor exploit failures on rest mode resume?

If your console powers off completely during rest mode resume, the exploit failed. Ensure Supply Power to USB Ports is set to "Always" under power saving settings, verify your console model (Base vs Pro ps5 pro hypervisor memory mapping), and confirm you are running a supported firmware version (13.00–13.60).

Does Byepervisor Reborn include a complete PS5 HEN or homebrew launcher?

No. Byepervisor Reborn is a developer-focused payload designed to break hypervisor protections and disable XOM. It does not contain homebrew payload loaders, pirated game enablers, or custom kernel patches out of the box.

Can this hypervisor payload work on firmware 14.00 or higher?

While the underlying S3 power-state logic may theoretically persist on firmware 14.00, Byepervisor Reborn does not support 14.00 out of the box. Additionally, there is currently no public entry-level kernel exploit available for firmware 14.00 to launch elfldr.

Next Steps for Research

Byepervisor Reborn restores critical hypervisor-level access for security practitioners, opening up clean avenues for deep kernel analysis on modern PlayStation 5 software builds. By defeating Execute-Only Memory and providing reliable write access across both original and Pro models, this project lays the groundwork for future custom firmware research. Try building the payload using the PS5-Payload-Dev SDK guide this week and test kernel text extraction on your local setup. If you are developing custom kernel hooks, check out our breakdown of PS5 kernel offset resolution techniques next.