Kostya Kortchinsky

🇫🇷 grep'ing for memcpy() since 2002AD. Currently @ Databricks. Formerly GOOG, MSFT. Tweets are my own, and sometimes attempts at being funny.

[Kostya Kortchinsky @crypt0ad]

Escaping VMware Workstation through COM1 -- https://t.co/TBxZ5BuPit [VMSA-2015-0004]

[Kostya Kortchinsky @crypt0ad]

@lcfr_hax I guess it's done yet

[itszn @itszn13]

When testing Astra on ExploitBench we found that it was able to achieve 100% ACE on all 41 CVEs

So we made a contamination free internal port using only V8 CVEs from the past 3 months. Astra still showed a major capability increase over 5.6 and did so with a lot fewer tokens!

[WarTranslated @wartranslated]

WSJ: CIA Director Ratcliffe arrived in Moscow after the US gathered intelligence indicating mobilization preparations and plans to test NATO's resolve.

Former Deputy Director of US National Intelligence Beth Sanner told the publication that Ratcliffe may have met with Putin to deliver a warning along the lines of: "We know what you are going to do, and you'd better not do it."
https://t.co/Kvb9b4MvOA

[Brad Spengler @spendergrsec]

Bas! https://t.co/zzQQRUkqHQ

[itszn @itszn13]

Apple finally released a good chunk of my WebKit bugs!

Good idea to update your Safari…

[Tibo @thsottiaux]

Incredible things are happening at OpenAI right now. Energy is high.

[OpenAI @OpenAI]

We’re expanding our cybersecurity initiative Daybreak and introducing GPT-5.6-Cyber, a new model for advanced, authorized cybersecurity work.

As the threat landscape evolves, we’re putting frontier intelligence in the hands of trusted defenders before attackers can deploy offensive AI at scale.

[_ZN4DionC1Ev @justdionysus]

Our BH slides are up at: https://t.co/162aGs2kwY we’ll release a more detailed description of our macOS LPE later but this gives the gist even without the commentary. Thanks to all who came to the talk!

[Brad Spengler @spendergrsec]

347 Linux kernel CVEs published today BTW

[Brad Spengler @spendergrsec]

AF_UNIX find, nice @ky1ebot

[Kostya Kortchinsky @crypt0ad]

Black Hat USA 2026: The 'Breaking' News: The OpenAI–Hugging Face Incident -- https://t.co/jKBsS2uK52

[Kostya Kortchinsky @crypt0ad]

Go attend. I've seen a lot of "security things" in my life, but all of this still has me floored.

[Black Hat @BlackHatEvents]

🚨ANNOUNCEMENT: Don’t miss "The 'Breaking' News: The OpenAI–Hugging Face Incident - A Technical Reconstruction and Its Implications for AI” — Join us at Black Hat USA 2026 for an exclusive deep-dive into one of the most significant AI security incidents in history.

When AI Goes Rogue. The Incident That Changed Everything. An OpenAI evaluation agent broke out of its sandbox, infiltrated Hugging Face infrastructure, and attempted to steal test answers—all autonomously. No human involved. The era of AI-driven cyberattacks is here. Are you prepared?

Featuring Michael Dalton | Technical Staff, OpenAI
Eric Wallace | Researcher, OpenAI
📍Wednesday, August 5 | 1:00pm-1:40pm ( Oceanside A, Level 2 )
Learn more 🔗 https://t.co/dQlAYL99sx

[clem 🤗 @ClementDelangue]

The first autonomous agent cyberattack is an unprecedented event that deserves unprecedented transparency. Today we’re sharing everything we can: a full technical timeline, an interactive replay, and how we used an open model to defend ourselves, so defenders everywhere can learn from it and prepare for what’s next.

https://t.co/uPxIpjW8Xn

[Rémi Kasprzyk @KasprzykRemi]

Cette photo mérite absolument tous les prix. Elle a même sa place au Louvre.

Elle relate précisément l’inertie de l’individu face à l’effondrement.

Regardez la composition. Un chef-d’œuvre involontaire.

Au premier plan, le sable doré, les tongs abandonnées, la glacière. Le décor ordinaire du bonheur estival. Deux personnages assis, de dos, comme dans un tableau de Caspar David Friedrich. Sauf que Friedrich peignait des hommes contemplant le sublime. Ici, ils contemplent la catastrophe. Et ils ne bougent pas.

Au centre, le parasol. Publicitaire, criard, dérisoire. Un pastis face à l’apocalypse. C’est presque trop parfait : la France qui prend l’apéro pendant que le monde brûle. Aucun scénariste n’aurait osé.

Et puis le ciel. Les deux tiers de l’image. Cette muraille de fumée qui avale la lumière, ce dégradé d’ocre et de noir digne d’un Turner. La nature qui reprend la palette des maîtres pour peindre notre propre fin.

La femme photographie l’incendie avec son téléphone. Mise en abyme totale : nous documentons notre disparition au lieu de l’empêcher.

Cette image dit tout. Le déni, le confort, l’habitude. Nous sommes tous sur cette plage. Nous voyons tous le nuage. Et nous restons assis, parce que l’eau est bonne et qu’on a posé nos congés.

Les historiens de l’art parleront un jour de cette photo comme on parle du Radeau de la Méduse.

Sauf que cette fois, le naufrage, c’est nous qui le regardons depuis la plage.
💔🌍

[Yuhang Wu @wupco1996]

We successfully achieved an RCE on GitLab in its default configuration.
Historically, most GitLab RCEs have lived in the web or application-logic layers. This time, guided by the @depthfirstlabs spirit, we went deeper: into the low-level gem dependency chain beneath GitLab.
The result? By sending crafted JSON data, we could exploit memory-corruption vulnerabilities buried deep in that chain and take control of the GitLab application server.
@depthfirstlabs brings together some of the smartest people, and is building the best security AI agent. Follow our work, and come join us!

Read more about this in the comment...

[OpenAI @OpenAI]

We're partnering with @huggingface to investigate an unprecedented security incident.

Cyber-capable OpenAI models compromised Hugging Face production during a benchmark evaluation.

Sharing preliminary findings to help defenders understand emerging risks:

https://t.co/CIor15y9xk

[ESET Research @ESETresearch]

#ESETresearch discovered and reported to @certcc 11 old Microsoft-signed UEFI shim bootloaders that allow bypassing UEFI Secure Boot on most UEFI systems. Read about it at https://t.co/S9GawER5S6 @smolar_m 1/5

[Tibo @thsottiaux]

This actually not the version of GPT-5.6 Sol on Cerebras. Just normal /fast mode. Running it at 750+ TPS is a whole other thing.

[Sideway @SidewayRE]

Si vous êtes à #lehack et que le jailbreak de Kindle vous intéresse, je présenterai demain midi au village hardware le travail derrière le développement d'une fullchain !

[HawkTrace @hawktrace]

Our technical write-up on CVE-2026-45504 is now live.
https://t.co/IAPNyklt88

#exchange #cve-2026-45504 #hawktrace