We won $92,337 bug bounty using a single kernel 0-day

Join the discussion

• Hacker News
• it's all so tiresome

  so no mitigation except for kernel updates?

  by tryauuum
• Wow. A universal, unprivileged local kernel stack use-after-free enabling ~97%-reliable privilege escalation and container escape via a constrained write primitive, control-flow hijack, and ROP

  * Introduced in Linux 2.6.39 in 2011

  * patched in 7.1 (April 2026)

  by djfergus
• Read our technical walkthrough here to see how we won almost $10k bug bounty from a single Linux kernel 0-day -- GhostLock.

  Chaining GhostLock with a Firefox 0-day, we managed to remote control any Android device (even the latest Android 17) from a simple URL click. We name this full-chain exploit "IonStack", because it's IonMonkey 0-day in Firefox and a StackOverflow in Linux kernel.

  Our blog post -> https://nebusec.ai/research/ionstack-part-2/

  Exploit Github -> https://github.com/NebuSec/CyberMeowfia

  by etenal