CVE-2023-4515: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate command request size In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except for SMB2_OPLOCK_BREAK_HE command, the request size of other commands is not checked, it's not expected. Fix it by add check for request size of other commands.

Affected products

• Linux Linux Kernel: from 5.15.121, before 5.15.127 (fixed in 5.15.127); from 6.1.36, before 6.1.46 (fixed in 6.1.46); from 6.3.10, before 6.4 (fixed in 6.4); from 6.4.1, before 6.4.11 (fixed in 6.4.11); version 6.4 only; version 6.5 only

Published 2025-08-16. Last modified 2026-08-04.