CVE-2023-3865: Linux Kernel

High severity, CVSS 7.1. EPSS: 0.6% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bound read in smb2_write ksmbd_smb2_check_message doesn't validate hdr->NextCommand. If ->NextCommand is bigger than Offset + Length of smb2 write, It will allow oversized smb2 write length. It will cause OOB read in smb2_write.

Affected products

• Linux Linux Kernel: from 5.15, before 5.15.121 (fixed in 5.15.121); from 5.16, before 6.1.36 (fixed in 6.1.36); from 6.2, before 6.3.10 (fixed in 6.3.10); version 6.4 only

Published 2025-08-16. Last modified 2026-08-15.