SB2026082496 - Use of Uninitialized Variable in Linux kernel input driver

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Main Vulnerability Database SB2026082496

SB2026082496 - Use of Uninitialized Variable in Linux kernel input driver

Published: August 24, 2026

Security Bulletin ID SB2026082496
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

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-2026-74673)

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:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an uninitialized stack-based structure in evdev event handling functions when copying input_event structures to userspace. A local user can read crafted event data from the evdev client buffer to disclose sensitive information.

The issue affects padding bytes in struct input_event on architectures where explicit or implicit padding is present.


Remediation

Install update from vendor's website.

References