SB2025120473 - NULL pointer dereference in Linux kernel net phy driver
Published: December 4, 2025
Security Bulletin ID
SB2025120473
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) NULL pointer dereference (CVE-ID: CVE-2025-40239)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the __lan8814_ptp_probe_once() function in drivers/net/phy/micrel.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.