CVE-2026-74521

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: use memcmp() to compare ClientGUIDs

ClientGUID is a fixed-size binary value and can contain embedded NUL

bytes. strncmp() stops comparing at the first NUL byte, so different

ClientGUID values can incorrectly be treated as equal.

Use memcmp() in SMB3 multichannel session binding and

FSCTL_VALIDATE_NEGOTIATE_INFO to compare all SMB2_CLIENT_GUID_SIZE

bytes.