u/Additional-Milk1426

Until Cities Skylines II is available on Mac, I have no option but to enjoy this

This exploit basically can get root control of your system via corrupting a password file, and tricking the system into thinking it is root, and was discovered recently. Most people will be safe even without using the patch, but I prefer the philosophy of "better safe than sorry"

I am not smart enough to fully explain, so please look here : https://copy.fail/

Raspberry Pi OS is running a vulnerable kernel by default, and who knows when it will be fully upgraded, so for now, this script should do the job.

echo "install algif_aead /bin/false" | sudo tee /etc/modprobe.d/disable-algif.conf

The script above disables the kernel module that is used to get the root access. 99% of users will be unaffected by disabling this. Only a tiny handful of programs need this, most users will never even install said programs.

You must reboot for this script to take effect.

Also note that this is a PATCH!!! Not a full fix, it can only be truly fixed by the Raspberry Pi OS devs, this is more like a bandaid than anything.

Before running this script, the "test" script would say that it is vulnerable, I unfortunately did not take a screenshot of it while vulnerable, but it was similar to this message. You can see in the screenshot that after running the script, it is no longer vulnerable.

https://github.com/rootsecdev/cve_2026_31431/blob/main/test_cve_2026_31431.py

: This is the test script I used to check for a vulnerable system, feel free to use it on your systems.

This is not my patch, I found it from the r/linux subreddit, but I think it is valuable to have here, as I cant find any post talking about it here.

I DO NOT TAKE RESPONSIBILITY FOR ANYTHING THAT BREAKS ON YOUR SYSTEM!! RUN EVERYTHING HERE AT YOUR OWN RISK!! I

Thank you, and hope this helps some people!