CVE-2026-43185

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

ksmbd: fix signededness bug in smb_direct_prepare_negotiation()

smb_direct_prepare_negotiation() casts an unsigned __u32 value

from sp->max_recv_size and req->preferred_send_size to a signed

int before computing min_t(int, ...). A maliciously provided

preferred_send_size of 0x80000000 will return as smaller than

max_recv_size, and then be used to set the maximum allowed

alowed receive size for the next message.

By sending a second message with a large value (>1420 bytes)

the attacker can then achieve a heap buffer overflow.

This fix replaces min_t(int, ...) with min_t(u32)