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Hacker News
it's all so tiresome
so no mitigation except for kernel updates?
by tryauuum
The bug itself is almost boring - remove_waiter() clearing current's pi_blocked_on instead of the actual waiter's — which is exactly why it survived 15 years.
by valentynkit
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
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- Hacker News
- it's all so tiresome
so no mitigation except for kernel updates?
by tryauuum - The bug itself is almost boring - remove_waiter() clearing current's pi_blocked_on instead of the actual waiter's — which is exactly why it survived 15 years.by valentynkit
- 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