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VsockDrop: unprivileged Linux kernel LPE in the io_uring/vsock zerocopy path, no user namespaces needed. Bug affects Linux 6.7 -> 7.0.10, fixed in 7.0.11. PoC video: Ubuntu 26.04 LTS on bare metal. Exploit + mini write-up here:

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Maher Azzouzi

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20,451 görüntüleme • 2 ay önce •via X (Twitter)

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the 🐐

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appreciate you bro

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the no user namespaces line is the whole story. io_uring completes work asynchronously in kernel context, so the mitigation everyone leaned on, disabling unprivileged userns, buys nothing here. the attack surface moved and the hardening did not follow.

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