AI BriefingAnthropic Mythos Vulnerability Discovery Verified
·2026.06.01 16:20
Key point
This covers the verification of major security vulnerabilities discovered by Anthropic's unreleased model, Mythos.
Details
Security vulnerabilities claimed to have been discovered by Mythos Preview, an unreleased Anthropic model, have been largely verified through multiple independent sources.
Key verification points:
- OpenBSD vulnerability: A TCP SACK processing bug introduced around 1998, which allows an attacker to remotely crash a system via a TCP connection.
- FFmpeg vulnerability: An out-of-bounds write bug caused by a counter collision in the H.264 decoder. The vulnerabilities found by Mythos were patched in FFmpeg 8.1.
- Linux kernel vulnerability chain: Mythos succeeded in autonomously chaining multiple kernel vulnerabilities for privilege escalation. The cost of generating this attack chain was under $2,000 in tokens.
Anthropic is currently funding the Linux Foundation to address these vulnerabilities.
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