CVE-2026-46330

HIGH

MEDIUM Priority: 0.01 BB Relevance: 41/100

Published: 2026-06-09 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

Description

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.

Weakness Classification (1)

CWE-416

Affected Software (8)

Vendor	Product	Version
Linux	Linux	d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < c7cb174a1edc80fe1f75b169a57726ed46704074
Linux	Linux	d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < 74d33525db50d9d95156c79cc874752654e66e70
Linux	Linux	d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < dc824ffc28e5c9d0020b6bee2651b4aceed5b2bf
Linux	Linux	d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < dc24e03be0e4bb2aad1a9b272c4f86de3b11969a
Linux	Linux	d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < 6c505d95c69e27dbf28fea29dc84d2498d69515c
Linux	Linux	d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < df31a6b0a3057e66994ad6ccf5d95b9b9514f033
Linux	Linux	5.17
linux	linux_kernel	5.17 – 6.19.4