Felix "fx" Lindner has died

133 points

by

@is_taken

|

March 2nd, 2026 at 3:53pm

@_pdp_

March 2nd, 2026 at 5:52pm

What sad news.

I met FX many years ago during a Black Hat event. At the time, I was working on a class of vulnerabilities related to zip archives. Not only did he know exactly what I was on to, but he was able to articulate the actual issue and explain what was happening behind the scenes and why my exploit was working.

A true legend.

@nbk_2000

March 2nd, 2026 at 5:55pm

It's been a long time, but I've always cherished our late night conversations at the Alexis Park. Truly a great hacker. RIP my friend

@sllabres

March 2nd, 2026 at 6:52pm

I'm really sad, even if I never met him personally and only knew him from his talks, his software and of course his blog.

I had hoped that after his illness he would be granted some time for personal life and recovery — which makes this news all the more shocking.

@pigeons

March 2nd, 2026 at 5:10pm

His excitement and deep interest in things from cisco to web security to life was inspiring.

@kriro

March 2nd, 2026 at 5:35pm

Loved his CISCO talks. RIP.

@BoredPositron

March 2nd, 2026 at 6:05pm

World got a little darker today. Rip my friend.

@cc-d

March 2nd, 2026 at 6:58pm

I never really knew felix, but mob says he was a pretty cool guy, and we miss him already.

Thank you felix for everything you did for mob :)

@a2800276

March 2nd, 2026 at 6:48pm

Very sad news to hear. People of his caliber are sorely needed in the community. My condolences to everyone close to fefe.

@hcbdbdrb

March 2nd, 2026 at 6:07pm

While he was a dividing personality with strong opinions, he had his heart in the right place

RIP

@c0l0

March 2nd, 2026 at 5:19pm

A true hero and legend. RIP.

@GabrielTFS

March 2nd, 2026 at 7:57pm

Sad news. I wonder if his projects (e.g. dietlibc) will continue development or not...

@kan0r

March 2nd, 2026 at 8:49pm

Sad news.

@krater23

March 2nd, 2026 at 6:45pm

fuck

@ephou7

March 2nd, 2026 at 6:30pm

He was a good hacker but also a HUGE, arrogant jerk who treated a lot of people quite badly.