Linux exploit instantly grants administrator access on ...

[Qqmike]

(I did say, "It's fixed." :-) )

[oshunluvr]

...older versions are still vulnerable.

From what I can see, only if you haven't updated the "kmod" package.

[kc1di]

If you are talking about Copy Fail? This threat I believe has already been addressed in 26.04 see here.
https://discourse.ubuntu.com/t/fixes...inux-kernel-lo

older versions are still vulnerable.

[acheron]

See: https://ubuntu.com/blog/copy-fail-vu...ixes-available

[Qqmike]

Linux exploit instantly grants administrator access on most distributions since 2017 —
cryptography optimization snafu grants root privileges to local users

(It's fixed.)

This.

It's above my head, but interesting.

... they found it with the help of an AI assistant. Given that the source code for the Linux kernel is by definition public,
in theory, any serious attacker would find it just as easily.