CVE-2026-98405

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

smb: client: fix missing iov bounds check in parse posix sids()

In parse posix sids(), sidsbuf end is calculated using the server-supplied out len without being validated against the actual length of the received iov (iov len).

If a server provides an inflated out len, sidsbuf end will point past the end of the iov. This defeats the bounds guards in posix info sid size(), allowing out-of-bounds reads into adjacent kernel memory.

Fix this by rejecting responses where the calculated sidsbuf end would exceed the received iov boundaries or cause pointer wraparound.