CVE-2026-98394

In the Linux kernel, the following vulnerability has been resolved:

af unix: Return immediately when manage oob() returns NULL for 0-length buffer.

Fahad Alharbi reported that recv(0, MSG PEEK) triggers busy-wait in unix stream read generic() if recv() is blocking and the last skb in the queue is MSG OOB skb.

In such a situation, TCP returns 0 immediately regardless of blocking or non-blocking.

Let's follow the behaviour.