CVE-2026-46330

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

Revert "net/smc: Introduce TCP ULP support"

This reverts commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40.

As reported by Al Viro, the TCP ULP support for SMC is fundamentally

broken. The implementation attempts to convert an active TCP socket

into an SMC socket by modifying the underlying `struct file`, dentry,

and inode in-place, which violates core VFS invariants that assume

these structures are immutable for an open file, creating a risk of

use after free errors and general system instability.

Given the severity of this design flaw and the fact that cleaner

alternatives (e.g., LD_PRELOAD, BPF) exist for legacy application

transparency, the correct course of action is to remove this feature

entirely.