Charles (@unsignedbytes) header
Charles (@unsignedbytes) profile picture

You can never have enough compute.

192.80.53.0
Joined May 2026
Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)Photo by Charles (@unsignedbytes)
Samsung. CVE-2026-21155
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Replying to @christopherowen
Wow, interesting stuff. Ill have to try it
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Replying to @antitree
CVEs should be scored like academic papers with some measurement for impact value.
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Tldr: bad boot-logo handling that can break the early boot process and allow code execution
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Replying to @janicleader
Just point your agent at the repo if you are non technical or have trouble.
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Replying to @IntCyberDigest
Why dont you cover what I did? I got code to run really early in the bootloader on a S25 FE, with this primitive its possible to boot custom images teapaw.org/unsignedbytes/status/2…
Samsung. CVE-2026-21155
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Charles retweeted
Qualcomm Snapdragon 6 Gen 1 dieshot annotated kurnal-insights.com/dieshot/ The cheaper you go, the smaller the GPU is
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Replying to @SJRonanMD
"Two towers that researchers can actually reach, instead of a rack nobody walks up to." Was this tweet AI?
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I dont think its organic but ok
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Replying to @Moto @Snapdragon
I want one 😎
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I'm proud my work makes it possible to run custom images on locked bootloaders. I'll mention this work in my write-up and link the repo. Amazing work. github.com/Gabriel2392/SVE-2…
For Exynos enthusiasts: You can now fuse your own secure boot keys in your device, allowing to permanently run custom images on locked bootloader. Repo: github.com/Gabriel2392/SVE-2… Up to 2026-10-05 security patch for fusing (once it's fused you can flash whatever you want, it never goes away) Only s5e8825 is supported in the main branch. You can always port it to your Exynos device and PR it. As always big up Gabriel
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Replying to @encrypted_past
I can hear the nerds now "Just rewrite everything in rust"
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Replying to @IndieGameJoe
Are you anti AI now?
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Replying to @IndieGameJoe
Imo it would have turned out better if they used AI. 😺
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Replying to @roddux
Tomorrow
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Working on a proper writeup with working PoC code. I'll post it tmrw.
My first published CVE. Samsung. CVE-2026-21155
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