Improper initialization in Linux kernel - CVE-2026-97963
Published: September 28, 2026
Vulnerability identifier: #VU152502
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-97963
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-97963
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3