SB20260928230 - Improper initialization in Linux kernel stmicro stmmac driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928230
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper initialization (CVE-ID: CVE-2026-97963)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger undefined behavior.
The vulnerability exists due to improper initialization in the stmmac driver's ptp_lock when offloading a TAPRIO schedule while the interface is down. A local user can configure a TAPRIO schedule to trigger undefined behavior.
The issue occurs when the interface has never been opened.
Remediation
Install update from vendor's website.