CVE-2026-43185
Description
AI Translation Available
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)
https://git.kernel.org/stable/c/55abc475d096da4a5356b6efb0cfdc6156bc1550
https://git.kernel.org/stable/c/6b4f875aac344cdd52a1f34cc70ed2f874a65757
https://git.kernel.org/stable/c/ceae058eb707ddd0d68f0872f9d9f23b7c30c37b