PT-2026-43894 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-46027

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

net/smc: avoid early lgr access in smc clc wait msg

A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group.

The decline handling in smc clc wait msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged.

This preserves the existing sync err handling for established link-group contexts and avoids touching link-group state before it is available.

Fix

Related Identifiers

CVE-2026-46027

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-46027 · Security Note
• https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f · Note
• https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712 · Note
• https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2 · Note
• https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f · Note
• https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069 · Note