SB2026052848 - Improper Initialization in Linux kernel smc

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Main Vulnerability Database SB2026052848

SB2026052848 - Improper Initialization in Linux kernel smc

Published: May 28, 2026

Security Bulletin ID SB2026052848
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Initialization (CVE-ID: CVE-2026-46027)

CWE-ID: CWE-665 - Improper Initialization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper access to uninitialized state in smc_clc_wait_msg() when handling a CLC decline during an early handshake stage before link group association. A remote attacker can send a specially crafted decline message to cause a denial of service.

The issue occurs for first-contact declines received before link group setup has completed.


Remediation

Install update from vendor's website.

References