The PS5 Relapse jailbreak has only just become public, and early testing is already showing that getting a public exploit chain for firmware 7.00 through 13.60 does not mean everything around it is immediately polished.
One message in particular is causing confusion:
“elfldr is listening on port 9021”
Despite how it may appear, this message is not an error.
According to the official Relapse documentation, after a successful exploit the ELF loader starts listening on port 9021. This is the point where compatible ELF payloads can be sent to the PS5.
In other words, reaching this message means the exploit has progressed to the payload-loading stage.
Why are some users getting stuck there?
Relapse originally provided a simple path for loading supporting payloads such as Kstuff, ShadowMountPlus and etaHEN.
However, the first days of public testing have exposed compatibility problems across some firmware versions and payload combinations.
Users on firmware including 13.00, 13.40 and 13.60 have reported reaching the ELF loader but then failing to get the expected payload environment working correctly.
Other users have reported that some payloads work while others fail.
These community reports should not be interpreted as evidence that Relapse itself is fake or that port 9021 has failed.
The ELF loader is designed to listen on port 9021 for ELF payloads. The problem can occur in the next stage: getting the expected payloads loaded and working correctly on a particular firmware.
Kernel stability is another problem
Payload compatibility is not the only issue.
The Relapse developers themselves warn that the WebKit stage may require several attempts.
More importantly, the official documentation states that the kernel exploit can hang or panic the console.
Users are also reporting systems becoming stuck around messages such as:
“Kernel: checking aio groups”
Some users report eventually reaching the ELF loader, while others encounter browser hangs or have to restart the console and try again.
That behaviour is consistent with the developers' warning that the current exploit is not completely reliable.
Relapse is still a major breakthrough
These problems do not change the importance of the release.
Relapse provides a public exploit chain covering PS5 firmware 7.00 through 13.60.
The chain uses a browser stage followed by kernel exploitation based around an aiomultiwait use-after-free race to establish kernel read/write access.
After successful exploitation, elfldr provides the mechanism for running compatible ELF payloads.
The current problems instead demonstrate an important difference between releasing an exploit and building a mature jailbreak environment around it.
The homebrew ecosystem now needs to catch up
Kstuff, etaHEN, ShadowMountPlus, payload managers, autoloaders and other homebrew components all form part of the wider PS5 jailbreak ecosystem.
Those projects can have their own firmware compatibility requirements and bugs.
This means a console successfully reaching the Relapse ELF loader does not automatically guarantee that every existing homebrew payload will work correctly.
Developers are now adapting the surrounding tools to the much wider firmware range opened by Relapse.
What does “listening on port 9021” actually mean?
The process can be simplified like this:
Browser exploit → Kernel exploit → Kernel access → ELF loader starts → Port 9021 listens → Compatible payloads are loaded
Therefore:
“elfldr is listening on port 9021” = the ELF loader is ready.
It should not automatically be described as the jailbreak failing.
What happens after that point depends on the payload being loaded and whether it properly supports the console's firmware and current exploit environment.
Current Relapse status
🟢 Public exploit: Confirmed
🟢 Supported firmware: 7.00–13.60
🟢 Kernel read/write: Confirmed by the project's documentation
🟢 ELF loader: Port 9021 is part of the intended exploit process
🟡 Reliability: Kernel hangs and panics can occur
🟡 Payload compatibility: Still developing across newer firmware
🟡 13.x experience: Working, but still rough depending on firmware and payload
🔴 Firmware 14.00: Not supported by Relapse
What happens next?
Relapse has opened the door to a much larger group of PS5 consoles, but the next stage may be just as important as the exploit release itself.
Developers now need to improve reliability and make the surrounding homebrew ecosystem work consistently across the newly supported firmware versions.
That includes payload loaders, Kstuff, etaHEN, ShadowMountPlus and other homebrew tools.
For users, the important point is simple: seeing “elfldr is listening on port 9021” does not necessarily mean something has gone wrong.
It means Relapse has reached the ELF-loading stage.
The bigger challenge right now is making everything that comes after it work reliably.
MicLinks Radar will continue tracking Relapse, PS5 firmware 13.x payload compatibility and progress toward newer firmware such as 14.00.
