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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:

Maher Azzouzi

1,403 subscribers

20,552 views • 2 months ago •via X (Twitter)

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5 Comments

vmpr0be2 months ago

the 🐐

Maher Azzouzi2 months ago

appreciate you bro

Sakib Sarkar🐞2 months ago

Nice

rusa2 months ago

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.

idk2 months ago

Gg

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