Soursen

Independent writing on infrastructure, AI, security and crypto.

Security

Security covers vulnerabilities and the software supply chain, checked against the advisory or the incident report that records what failed.

Banner for “An AI Found a Critical Linux Bug, Then Wrote the Exploit in 53 Minutes”

Security

An AI Found a Critical Linux Bug, Then Wrote the Exploit in 53 Minutes

CVE-2026–98432 is a use after free flaw in the Linux kernel’s TCP code, rated 9.8 out of 10, that can hand a remote attacker root on a server running multipath TCP. What makes it different from the usual critical CVE is who found it. An unreleased internal AI model at Anthropic spotted the bug, then built a working root exploit in about 53 minutes. I went through what the flaw is, who is patched, and why the AI part changes the math for defenders.

9 min read

Banner for “A Privacy Company Called Security Caution “Loser Thinking.” The Problem Is Which Company Said It”

Security

A Privacy Company Called Security Caution “Loser Thinking.” The Problem Is Which Company Said It

Proton, the encrypted email company that sells itself on taking security seriously, had its CEO tell an employee that asking for a few days of security testing before shipping AI written code was “bullshit and loser thinking,” according to 404 Media. The CTO says about 90% of Proton’s code is now written by AI. I think the story matters less for what Proton did and more for the exact contradiction it exposes.

8 min read

Banner for “Binance Lost $6.3 Billion in About 20 Minutes. The Attack Started With One Laptop”

Security

Binance Lost $6.3 Billion in About 20 Minutes. The Attack Started With One Laptop

On 29 October 2026 attackers drained roughly $6.3 billion from Binance hot wallets in about 20 minutes, 4 times the size of the previous record. The way in was a compromised engineer’s laptop, and the clever part was a new Ethereum feature called EIP-7702 that let them turn a hot wallet into an automatic sweeper. I went through how it happened, how much got frozen, and why this did not break crypto the way it would have a few years ago.

8 min read

Banner for “Microsoft Keeps Closing the Local Account Loopholes in Windows 11, and the Age API Is the Reason…”

Security

Microsoft Keeps Closing the Local Account Loopholes in Windows 11, and the Age API Is the Reason…

In October 2026 Microsoft quietly killed the last easy way to set up Windows 11 without a Microsoft account, after spending 2025 blocking the rest. I went through exactly which bypasses are gone, what still works, and why a new feature called the Windows age API, that reports whether you are a child, a teen, or an adult, is the piece that ties it all together. None of this requires a conspiracy to explain, the mechanism is on the record.

10 min read

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