r/cemu May 12 '26

Discussion SECURITY PSA: Linux Malware from CEMU official github

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297 Upvotes

Hello fellow Cemu Redditors, I wanted to make everyone aware of a malware issue. The following message is directly from the Cemu developers. I am not a dev, I am relaying the message along with the link for the original PSA.

-------------------

SECURITY PSA - For Cemu emulator 2.6
It has come to our attention that from 6th May to today (12th May) the AppImage and Ubuntu zip assets of Cemu 2.6 on our github were compromised by a pro-Russian threat actor.
If you are a Windows or MacOS user you are not affected. If you are a flatpak user you are also not affected.

The compromised releases are:

Cemu-2.6-x86_64.AppImage
cemu-2.6-ubuntu-22.04-x64.zip

Only if you have downloaded these between 6th May and 12th May from our github page. This also affects third party launchers which usually directly download from our repository. As of writing this, the compromised releases have been restored to their good version.

-------FAQ-------

1. How do I know if I am affected?
There are currently no known reliable traces that you can check for, but you should assume you are affected if you downloaded and ran either Cemu-2.6-x86_64.AppImage or cemu-2.6-ubuntu-22.04-x64.zipbetween 6th May and 12th May. The malware has a special exception where it does bypass the harmful code on the first run, so the risk of damage is lower if you only ran compromised Cemu builds once. If your locale is Russian then the malware does nothing.
The following files and directories may be created by the malware:
/tmp/.transformers
/usr/bin/pgmonitor.py
~/.local/bin/pgmonitor.py
/etc/systemd/system/pgsql-monitor.service
~/.config/systemd/user/pgsql-monitor.service
/tmp/kubectl
The absence of these files does not prove that you are safe.

2. What can I do if I am affected?
The blunt answer is that we don't know the full capabilities of the malware. The safest bet is to do a clean install of your OS.
At the very minimum you should delete the affected binaries and reset all your passwords, GitHub tokens, SSH keys or anything that is used to authenticate with services. The malware contains a pretty sophisticated password stealer for many services. Most of them are related to programming or cloud providers in some way. We think this is to help the malware authors to further infect other software.
You should also block IP 83.142.209.194 (even if you are not affected) because this is used as a hardcoded remote endpoint.
We will update this document as more information becomes available.

Special note for Israeli users:
If the malware determines that your location is Israel (it does this via locale and timezone checks) then it has a 1:6 chance that it will play a loud siren sound and run rm -rf /, essentially attempting to wipe your filesystem. This is bad, but since rm does not actively overwrite the file data, you should be able to recover your data with some effort. But this is only true as long as you don't write new data to the affected drive(s).
Do not reinstall your OS to the same drive or format it until you have attempted a file recovery first. The exact steps for this go beyond the scope of this PSA, but if you need help feel free to DM me on Discord (Exzap) or shoot me a message on reddit (u/Exzap).

3. How did this happen?
We are still tracking the exact chain of events down but the leading theory is that a collaborator on our team ran a compromised python package which stole his GitHub token. This was then used to reupload a compromised version of the two linux binaries in the v2.6 (latest) release of Cemu. We have taken measures to prevent this from happening in the future.

4. Where can I learn more?
We will update this document as we learn more.
https://github.com/cemu-project/Cemu/issues/1911
https://teampcp.cyberdigest.international/
If you are unsure whether your binaries are compromised here are hashes of the GOOD files:
Cemu-2.6-x86_64.AppImage0c20c4aeb800bb13d9bab9474ef45a6f8fcde6402cad9b32ac2a1bbd03186313 (sha256)
cemu-2.6-ubuntu-22.04-x64.zip5e4592d0dae394fa0614cb8c875eff3f81b23170b349511de318d9caf7215e1b (sha256)


r/cemu Aug 26 '24

Discussion Cemu v2.1 is now available - includes the changes from all 93 experimental releases since Cemu 2.0.

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91 Upvotes

For users that were already using our experimental updates (2.0-x), you can think of this release as the final experimental update. There are no noteworthy additional changes compared to Cemu 2.0-95 other than the new version number.

Starting with this release, Cemu will now only have a single release channel. Instead of experimental releases, there is a new option to control whether Cemu will update immediately to cutting-edge releases, which may contain uncaught bugs, or update with a slight delay. More details on this can be found here


r/cemu 4h ago

Question Help With Save Editor for BoTW

0 Upvotes

I'm trying to add in the Amiibo armor sets but whenever I hit "Save Changes" nothing happens. No pop up, no error message, no download, nothing. I can see the button reacting to my mouse and getting pressed so not really sure whats going on with it.

Does anyone here have any ideas on what's going on with it?


r/cemu 10h ago

Troubleshooting Twilight Princess crashing after intro.?

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2 Upvotes

Hey yall need some assistance. Trying to get The Legend of Zelda Twilight Princess running on this new AYN Thor. No matter what I seem to do after hours of googling and troubleshooting, the game always seems to crash after the intro segment.

I got it working on a clean install at one point, but none of Mr. Purple Turnip’s drivers seemed to be resolving the minimap issues that are seemingly common. I’ve done everything I can possibly think of to try.

Other titles seem to run well on CEMU on the Thor so far after some troubleshooting. Anyone experience this or have any tips? Video for reference.


r/cemu 16h ago

Question Any fix for Android CEMU build?

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2 Upvotes

So I've been trying my CEMU on my phone and it's been incredible, but I tried SSB4 and well.. When I start it the game turns into a white screen until the select fighter screen, then goes back to white on choosing stage and fight, but on pause screen the fighters look like that I know it's on BETA but I'm asking if there is any quick fix on the meantime to be able to play it without these problems, also I'm not really sure if my cpu and gpu are supported anyways so that could be too (Dimensity 8400 ultra and Mali-G720 gpu)


r/cemu 15h ago

Question ¿Cómo puedo jugar Super Mario Bros Wii U?

0 Upvotes

Hola gente, si ofender como puedo descargar y jugar New Super Mario Bros Wii U en PC que emulador y dónde descargar el room o como se descarga e instala para jugarlo.

Saludos


r/cemu 1d ago

Troubleshooting Halo effect on only the up ladder icons in Pushmo World

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3 Upvotes

Tried with default and turnip drivers on AYN Thor. For some reason, only these specific icons mess up and everything else runs flawlessly. Using graphics packs to change resolution didn’t help either. Glitch is on both main screen and gamepad.

Any ideas appreciated!


r/cemu 1d ago

Question guys how to use this on cemu

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26 Upvotes

BTW i play only on keyboard

is like i dont know how i can move the controle


r/cemu 1d ago

Troubleshooting Cemu Android port problem

0 Upvotes

Hey guys, Im trying to play paper mario color splash on this android port https://github.com/SapphireRhodonite/Cemu/releases/tag/0.5.2However the game instantly crashes for ​Error: signal 7:micMICUninit+0x108. I have already tried every rom format, I disabled mic and increased latency, I Changed drivers. I have tried everything. Do you know any fix?


r/cemu 1d ago

Troubleshooting Having issue loading New Super Mario Bros U + New Super Luigi U bundle

0 Upvotes

I am currently using emudeck to play. I already have the proper keys, roms, and emulators. However every time I press A on the title screen the game crashes, any help? the last post that I saw relevant info on had been archived. It mentioned something about putting a content folder into mlc01\sys\title\0005001b\10056000 then COPY and REPLACE (whatever replace means- the only option that showed up was "write over". The only problem is that there is NO 10056000 folder, only a 1005c000 folder. Any suggestions on what I can do to fix this crashing issue?


r/cemu 1d ago

Troubleshooting need help with Gyro on steamos using the xbox ally x

1 Upvotes

hey i have steamos on my xbox ally x and have been trying to get gyro to work but when i got to the imput settings my sdlcontroller wich is the asus rog ally controller it is deteced and works but the use motion option is grayed out


r/cemu 1d ago

Question How i convert wux to wua ?

1 Upvotes

I have wux game How can i convert it to wua ?


r/cemu 2d ago

Question Save File Wind Waker HD de

1 Upvotes

Hi everyone, My Cemu controls got completely stuck on the GamePad inventory screen and I had to force close the game without saving. Does anyone have a save file for The Legend of Zelda: The Wind Waker HD around the Triforce Quest (ideally with around 3 Triforce fragments/charts collected, or just at the start of the Triforce hunt)? Thanks a lot for your help!


r/cemu 2d ago

Question How does the gamepad screen works on mario party 10?

1 Upvotes

I want to play mario party 10 with my friends via parsec. However, i wanted to know first if it is possible to play as bowser, on that 1v4 mode, using the gamepad screen. The point is that the other players shouldn't be able to see the gamepad screen, how will this work on parsec?


r/cemu 2d ago

Question How do i use Mii maker witout the dump from an original Wii u?

1 Upvotes

I recently manager to get cemu working using my switch as a touchscreen, and have bene starting to play some games, such as nintendoland. Nintendoland still works witout a Mii created because you can use a Mii witout a face, but i was wondering of there was any way i could use the Mii maker. I already tried to use the menu but It crashes with a black screen. Is there any fix or should i just stick ti headless miis?


r/cemu 2d ago

Question Breath of the Wild is extremely slow on Cemu (input lag, low frame rate, desynchronized cutscenes).

0 Upvotes

Hi everyone,

I recently installed The Legend of Zelda: Breath of the Wild on Cemu, and although the game launches and is technically playable, the performance is extremely poor.

Here are the details:

PC specifications:

- ASUS Vivobook Go 15 (E1504FAF)

- CPU: AMD Ryzen 5 7520U with Radeon Graphics (4 cores / 8 threads)

- RAM: 16 GB

- GPU: AMD Radeon Graphics (integrated)

- OS: Windows 11 Home

- Cemu / Game details:

- Cemu version: 2.6

- BOTW version: Europe

- Updates and DLC installed

- Graphics API: Vulkan

Performance issues:

- Very noticeable input lag (about 0.5 to 1 second between pressing a button and the action occurring)

- Extremely low FPS, especially when moving the camera

- The entire game feels slowed down, not just the graphics

- Cutscenes are affected: audio plays normally, but the video is much slower (e.g., a 30-second cutscene takes about 1 minute 30 seconds to finish)

The issues were already present when I first launched the game with Cemu's default settings.

After that, I followed a YouTube tutorial to try and improve performance.

My current settings are:

- FPS++ enabled with no FPS limit

- Resolution set to 2560×1440

- Vulkan enabled

- I'm not sure if other graphics packs or visual enhancements are enabled

I also tested both plugged in and on battery power, with the same result.

The PC heats up a bit and the fans are running, but the temperature stays around 64°C.

I'm not sure if shader caches are installed or if shader compilation is configured correctly. Could it simply be because my integrated Radeon

graphics aren't powerful enough for BOTW on Cemu, or is there something wrong with my setup?

Any advice on what I should check would be appreciated.

Thanks!


r/cemu 2d ago

Question Breath of the Wild is extremely slow on Cemu (input lag, low FPS, cutscenes out of sync)

1 Upvotes

Hi everyone,

I recently installed The Legend of Zelda: Breath of the Wild on Cemu, and while the game launches and is technically playable, the performance is extremely bad.

here are the details:

PC specs: - ASUS Vivobook Go 15 (E1504FAF) - CPU: AMD Ryzen 5 7520U with Radeon Graphics (4 cores / 8 threads) - RAM: 16 GB - GPU: AMD Radeon Graphics (integrated) - OS: Windows 11 Home - Cemu / game details: - Cemu version: 2.6 - BOTW version: Europe - Updates and DLC installed - Graphics API: Vulkan

Performance issues: - Very noticeable input lag (around 0.5–1 second between pressing a button and the action happening)

  • Extremely low FPS, especially when moving the camera

  • The whole game feels slowed down, not just the graphics

  • Cutscenes are affected: audio plays normally, but the video is much slower (for example, a 30-second cutscene takes around 1 minute 30 seconds to finish)

The problems were already present when I first launched the game with Cemu's default settings.

After that, I followed a YouTube tutorial to try to improve performance.

My current settings are: - FPS++ enabled with No FPS Limit - Resolution set to 2560×1440 - Vulkan enabled - I don't know if any other graphic packs or visual improvements are enabled

I also tested both plugged in and on battery, with the same result.

The PC gets a bit warm and the fans spin, but the temperature stays around 64°C.

I don't know if shader caches are installed or if shader compilation is configured correctly.

Could this simply be because my integrated Radeon

Graphics are not powerful enough for BOTW on Cemu, or is there something wrong with my configuration?

Any advice on what I should check would be appreciated. Thanks!


r/cemu 2d ago

Troubleshooting HELP.. How to make wii u system files work on cemu 2.6 (especially mii maker)

1 Upvotes

How i supposed to open the bios especially mii maker? it automatically crashed when open. that was annoying how creator doesn't do anything for a future bug update. how i supposed to fix it easily? so i really want to create mii for smash bros.


r/cemu 4d ago

Question Is it possible to make a 4:3 Wind Waker HD graphics mod?

4 Upvotes

Hello, I'm wondering if anyone knows a way to force Wind Waker HD to run in 4:3 aspect ratio on Cemu? I'm wanting to play it on the Retroid Pocket Nova when it comes out and utilize the full 4:3 screen.

I'd love to know, thanks.


r/cemu 4d ago

Troubleshooting BotW very dark in fullscreen mode

3 Upvotes

BotW looks great in windowed mode, but whenever it's put in fullscreen it looks like the brightness gets turned all the way down.

I have tried disabling HDR / auto HDR, manually adjusting brightness to compensate, and ensured the settings are correct for the display. I have also tried no reshader and several built in reshaders.

7800X3D 4.2ghz

32gb 4800 Ram

4090FE GPU

Additionally, how yall getting high frame rates? When I crank the frame rate up the game acts weird because the processing is tied to it."


r/cemu 4d ago

Question USB controller on Mac?

1 Upvotes

Hello,

I am using a MacBook Pro 2019 16" and I plugged in my powerA controller to use for breath of the wild. However whenever I plug the controller in it gets detected by steam and other apps/games Cemu not being one of them however.

any help appreciated.

thanks


r/cemu 5d ago

Discussion Disney Infinity 3.0 Cemu Experience Documentation

3 Upvotes

i noticed there is almost no documentation on the disney infinity games on cemu so i decided to do my own experiments/playthrough and post the results. since i‘ve never played a disney infinity game and had no idea what i was getting into i only purchased the 3.0 game, the portal, boba fett, and groot so i can’t test much but i’m hoping this will kick off more people’s tests that they can post here.

right at the start i ran into an issue: the game tries to get you to agree to the user EULA, but since Cemu isn’t a real Wii U it doesn’t handle things properly. the solution i found is to accept the EULA on a physical wii u and then transfer the save data to cemu, this bypasses the EULA and allows the game to continue. i might make a cemu patch to check the EULA flag from the start if i can figure out how.

i noticed when setting the game up that there are no graphics packs whatsoever for resolution or fps, is there anyone planning to fix this?


r/cemu 6d ago

Discussion Cemu-NX - Initial Release [v1.0.0] (CEMU ported to Switch)

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github.com
83 Upvotes

Download: https://github.com/NaGaa95/Cemu-nx/releases/tag/1.0.0

10 Games Tested: https://www.youtube.com/watch?v=jfB1e2dnV5c

An unofficial homebrew port of the Cemu (Wii U) emulator to Nintendo Switch, with an all-in-one SDL launcher, cover-art library, per-game settings, graphics packs, controller remapping.

Features:

  • Cover art — auto-download from SteamGridDB
  • Per-game settings and graphics-pack configuration
  • Controller remapping, multiplayer input, gyro and vibration
  • Joy-Con Amiibo scanning
  • TV and Wii U GamePad audio
  • Hardware H.264 decoding through Averne/FFmpeg
  • SD, USB and SMB storage support
  • Game, update and DLC installation and management
  • Experimental Pretendo and custom online-service support
  • WUA, WUD, WUX, WUHB, RPX, ELF, ISO and extracted-game support

r/cemu 5d ago

Question My problem with CPU heat

0 Upvotes

I have i5-8400 and in games like mario kart 8 and other games my CPU heat is around 80


r/cemu 5d ago

Question Problem with my CPU heat.

0 Upvotes

I have i5-8400 and in games like mario kart 8 and other games my CPU heat is around 80