SB2025120488 - Improper error handling in Linux kernel tty serial driver
Published: December 4, 2025
Security Bulletin ID
SB2025120488
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper error handling (CVE-ID: CVE-2025-40222)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the sci_handle_fifo_overrun() function in drivers/tty/serial/sh-sci.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.