CVE-2026-72318

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

cifs: validate DFS referral string offsets

parse_dfs_referrals() validates that the response header and referral

array fit in the received buffer, but each referral also contains string

offsets supplied by the server.

Those offsets are used to compute the DfsPath and NetworkAddress string

pointers without checking whether they still point inside the response

buffer. A malformed referral can therefore make the computed pointer

exceed the end of the buffer. The resulting negative max_len is then

passed to cifs_strndup_from_utf16(), and the non-Unicode path forwards it

to kstrndup() as a size_t, allowing strnlen() to read out of bounds.

Validate each string offset before deriving the string pointer.