SB2026110331 - Use of Uninitialized Variable in Linux kernel trace

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Main Vulnerability Database SB2026110331

SB2026110331 - Use of Uninitialized Variable in Linux kernel trace

Published: November 3, 2026

Security Bulletin ID SB2026110331
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-2026-99219)

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

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to cause a denial of service by triggering a kernel fault.

The vulnerability exists due to use of uninitialized variables in the Linux kernel ftrace print_rec() function when a symbol lookup fails. A local privileged user can read available_filter_functions while a module is being loaded or unloaded to trigger dereferencing of an uninitialized module-name pointer in seq_printf(), causing a kernel fault.


Remediation

Install update from vendor's website.

References