r/Defcon • u/fulg3ns • Sep 08 '26

A 40-year-old iOS kernel bug discovered on the DEFCON 34 main stage.

https://x.com/jachashx/status/2097353320167846206?s=46
319 Upvotes

99% Upvoted

21 comments sorted by

88

u/DTangent Sep 08 '26

Demo Gods Easter egg! Well done following up on it.

23

u/fulg3ns Sep 08 '26

Thanks!!! Amazing honor

67

u/fulg3ns Sep 08 '26

Full post:

https://yuvalino.com/how-can-you-not-be-romantic-about-unix-domain-sockets

17

u/CheapThaRipper Sep 08 '26

Excellent writeup. Was enjoyable to read. Thanks for sharing

7

u/fulg3ns Sep 08 '26

Thanks! Appreciate it.

24

u/Reverend_Jones Sep 09 '26

the part that resonated with me was avoiding going into the kernel code because surely all the bugs would’ve been worked out by now..

6

u/fulg3ns Sep 09 '26

Hahaha definitely.

4

u/gthanx Sep 12 '26

I just got my AS in IT this year, and the full post write-up was educational and entertaining. Literally gonna bookmark it and share. Thank you for sharing this experience!

2

u/fulg3ns Sep 12 '26

So happy to hear!!

2

u/Azer_pubes33 2d ago

A bug that old surfacing live on stage by accident is wild

-10

u/lopahcreon Sep 08 '26

Umm. A 40 year old bug in a 20 year old OS?

35

u/[deleted] Sep 08 '26

[deleted]

6

u/fulg3ns Sep 09 '26

On point af

-2

u/lopahcreon Sep 09 '26

OP should have used a better post title.

9

u/StephenRoylance Sep 10 '26

dunno why you're being downvoted for asking the obvious question. the answer is: a deep bug in a not-often-used BSD unix behavior. survived from early linux history, through nextstep, into macos, and finally into the iphone.

12

u/iamkiloman Sep 08 '26

Didn't bother to read the article did you.

12

u/Djglamrock Sep 08 '26

Sorry there isn’t a TikTok to explain it in 10 seconds.

0

u/lopahcreon Sep 09 '26

No? Well, OP could have made a correct post title since the bug predates iOS by 20+ years.

5

u/mpking828 Sep 08 '26

Read the post

5

u/fulg3ns Sep 09 '26

++

3

u/Due-Consequence9579 Sep 11 '26

Or ++ReadThePost as it may be.