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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

1,404 subscribers

20,451 Aufrufe • vor 2 Monaten •via X (Twitter)

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5 Kommentare

Profilbild von vmpr0be
vmpr0bevor 2 Monaten

the 🐐

Profilbild von Maher Azzouzi
Maher Azzouzivor 2 Monaten

appreciate you bro

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Sakib Sarkar🐞vor 2 Monaten

Nice

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rusavor 2 Monaten

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.

Profilbild von idk
idkvor 2 Monaten

Gg

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