SB2024053135 - Use-after-free in Linux kernel watchdog driver

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Main Vulnerability Database SB2024053135

SB2024053135 - Use-after-free in Linux kernel watchdog driver

Published: May 31, 2024 Updated: May 14, 2025

Security Bulletin ID SB2024053135
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Use-after-free (CVE-ID: CVE-2021-47321)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the wdt_startup() function in drivers/watchdog/w83877f_wdt.c, within the lpc18xx_wdt_remove() function in drivers/watchdog/lpc18xx_wdt.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References