SB20260727369 - Use of Uninitialized Variable in Linux kernel fwnode_init()

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Main Vulnerability Database SB20260727369

SB20260727369 - Use of Uninitialized Variable in Linux kernel fwnode_init()

Published: July 27, 2026

Security Bulletin ID SB20260727369
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use of Uninitialized Variable (CVE-ID: CVE-2026-64220)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use of uninitialized memory in fwnode_init() when initializing a firmware node allocated on the stack or with a non-zeroing heap allocation. A local user can trigger code paths that dereference the uninitialized secondary pointer to cause a denial of service.

The issue can occur when a temporary software node is used and its lifetime is controlled by the caller.


Remediation

Install update from vendor's website.

References