Uploaded August 2026 | Updated September 2026, 2 weeks ago
We brought the Hextree glitching lab to the Embedded Systems Village at DEF CON 2026. Visitors could learn the basics of fault injection without prior hardware knowledge.
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Learn hacking on Hextree: hextree.io
Join the Hextree Discord: discord.gg/xgQpCQCpvy
To try the fault injection lab, you need:
1. laptop and headphones
2. pip install -U --pre faultier pyocd-faultier
3. signup at app.hextree.io
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Per video: patreon.com/join/liveoverflow
Per month: youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join
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WATCH, FOLLOW & READ
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Twitter: twitter.com/LiveOverflow
Instagram: instagram.com/LiveOverflow
TikTok: tiktok.com/@liveoverflow_
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#DEFCON #FaultInjection #EmbeddedSecurity #LiveOverflow
(ad) LiveOverflow YouTube channel is supported by advertisement and product placement.
We brought the Hextree glitching lab to the Embedded Systems Village at DEF CON 2026. Visitors could learn the basics of fault injection without prior hardware knowledge.
LEARN ON HEXTREE (ad)
Learn hacking on Hextree: hextree.io
Join the Hextree Discord: discord.gg/xgQpCQCpvy
To try the fault injection lab, you need:
1. laptop and headphones
2. pip install -U --pre faultier pyocd-faultier
3. signup at app.hextree.io
SUPPORT
Per video: patreon.com/join/liveoverflow
Per month: youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join
Buy my handwriting font (ad): shop.liveoverflow.com
WATCH, FOLLOW & READ
Second channel: youtube.com/LiveUnderflow
Twitch: twitch.tv/LiveOverflow
Twitter: twitter.com/LiveOverflow
Instagram: instagram.com/LiveOverflow
TikTok: tiktok.com/@liveoverflow_
LiveOverflow blog: liveoverflow.com
Hextree blog (ad): hextree.io/blog
#DEFCON #FaultInjection #EmbeddedSecurity #LiveOverflow
(ad) LiveOverflow YouTube channel is supported by advertisement and product placement.



![Understanding C Pointer Magic Arithmetic | Ep. 07
We debug the line that causes the heap overflow. And its a great opportunity to understand pointers in C.
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Learn hacking on Hextree: https://www.hextree.io/
Watch this video and more on Hextree: https://app.hextree.io/courses/yt-sudoedit/understanding-the-vulnerability
Join the Hextree Discord: https://discord.gg/xgQpCQCpvy
The full playlist: https://www.youtube.com/playlist?list=PLhixgUqwRTjy0gMuT4C3bmjeZjuNQyqdx
Grab the files: https://github.com/LiveOverflow/pwnedit
The original disclosure: https://blog.qualys.com/vulnerabilities-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit
Episode 07:
CHAPTERS
00:00 - Intro & Motivation
00:46 - Create Debug Build
01:02 - The Crashing Location
01:43 - Scary Pointer Magic
02:10 - *to++ = *from
02:56 - Explaining: from++
04:03 - Explaining: *from
04:56 - Explaining: to++
05:23 - Explaining: *to = *from
05:54 - The Copy While Loop
06:26 - Explaining: from[0] vs *from
07:14 - The Bug!
08:35 - Wrong Allocation Size Calculated
09:30 - Unescape Logic
10:15 - Why though?
SUPPORT
Per video: https://www.patreon.com/join/liveoverflow
Per month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join
Buy my handwriting font (ad): https://shop.liveoverflow.com/
WATCH, FOLLOW & READ
Second channel: https://www.youtube.com/LiveUnderflow
Twitch: https://twitch.tv/LiveOverflow/
Twitter: https://twitter.com/LiveOverflow/
Instagram: https://instagram.com/LiveOverflow/
TikTok: https://www.tiktok.com/@liveoverflow_
LiveOverflow blog: https://liveoverflow.com/
Hextree blog (ad): https://www.hextree.io/blog
#BufferOverflow #BinaryExploitation #LiveOverflow
(ad) LiveOverflow YouTube channel is supported by advertisement and product placement. Understanding C Pointer Magic Arithmetic | Ep. 07](https://i.ytimg.com/vi/zdzcTh9kUrc/mqdefault.jpg)