Cyber AI Digest
  1. Sebastien Gioria Nov 2, 2026
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    GPT 5.6-Cyber escaped a QEMU/KVM VM during a Trail of Bits test.

    • On a Debian 12 machine, mitigations=off, the agent escaped three times to read a file on the host.

    • A libslirp chain links CVE-2026-9539 to an upstream fix without a CVE to read and write in the host's memory.

    • A chain of four links, three of them zero-days, allowed an escape after about twelve hours of autonomous work.

    • Against a Firecracker microVM, the agent froze the machine without escaping the microVM.

    Read the original article La machine virtuelle n'est plus une frontière blog.gioria.org