George Karchemsky

Vulnerability Researcher

[George Karchemsky @gkarchemsky]

Excited to share my first Apple CVEs in ImageIO 🎉
CVE-2026-20675
CVE-2026-20634
Thanks to Apple Product Security and Trend Micro’s Zero Day Initiative (ZDI) for the coordinated disclosure

[George Karchemsky @gkarchemsky]

@gap_dev Amazing

[George Karchemsky @gkarchemsky]

@indigo79x @hexacon_fr likewise 😊

[George Karchemsky @gkarchemsky]

Had an amazing weekend at @hexacon_fr 2025 🇫🇷
My first international conference!
Loved meeting the offensive security community in person, making new friends, and talking with people who share the same passion 🔥

[George Karchemsky @gkarchemsky]

@pamoutaf @Blackhoodie_RE @hexacon_fr Such a fun moment recognizing you in person 😅 had a great time chatting!

[George Karchemsky @gkarchemsky]

@yuvaly0 Same here! Really enjoyed meeting you and everyone else there (:

[George Karchemsky @gkarchemsky]

First day at HEXACON 2025!
Great energy, great people, and lots to learn - can’t wait for tomorrow!👀

[George Karchemsky @gkarchemsky]

@yuvaly0 @hexacon_fr Your DMs are closed but I’d love to grab a coffee and chat tomorrow! ☕🙂

[George Karchemsky @gkarchemsky]

Really excited to be in Paris before @hexacon this weekend! Looking forward to the talks and meeting amazing people 🇫🇷

[George Karchemsky @gkarchemsky]

@wtsdev congrats 🙌🏻

[George Karchemsky @gkarchemsky]

@hardik05 size_t overflow when calculating i_len+1 if you pass 4 bytes of 0xffffffff for i_len, on 32-bit systems only?

[George Karchemsky @gkarchemsky]

@R00tkitSMM Congrats 🙌🏻

[George Karchemsky @gkarchemsky]

@yo_yo_yo_jbo Nice😉thank you for the blogpost!

[George Karchemsky @gkarchemsky]

@wdormann That’s amazing

[George Karchemsky @gkarchemsky]

@R00tkitSMM @_aniculae Which talk?

[George Karchemsky @gkarchemsky]

@hjy79425575 in which module was this bug?

[George Karchemsky @gkarchemsky]

@jeffssh @alexjplaskett Crazy! Very satisfying to watch😁

[George Karchemsky @gkarchemsky]

@ret2systems Amazing! Just finished reading “Hacking the Xbox” by @bunniestudios

[George Karchemsky @gkarchemsky]

@R00tkitSMM @Apple Congratulations 🎉

[George Karchemsky @gkarchemsky]

@matthewvenn Hey matt!
What is the most complex silicon design someone build in your course that is public? Is it possible to include RAM and ROM in the design?
Thanks 🙏🏻