CVE-2026-31478

In the Linux kernel, the following vulnerability has been resolved: ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len() After this commit (e2b76ab8b5c9 "ksmbd: add support for read compound"), response buffer management was changed to use dynamic iov array. In the new design, smb2_calc_max_out_buf_len() expects the second argument (hdr2_len) to be the offset of ->Buffer field in the response structure, not a hardcoded magic number. Fix the remaining call sites to use the correct offsetof() value.

The following products are affected by CVE-2026-31478 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31478.

URL	Resource
https://git.kernel.org/stable/c/0e55f63dd08f09651d39e1b709a91705a8a0ddcb
https://git.kernel.org/stable/c/4cb537ae4f37d7d0f617815ed4bed7173fb50861
https://git.kernel.org/stable/c/6aef1765d6807e0f027cd87f6ac973eb0879a46d
https://git.kernel.org/stable/c/70b4c414889492c522b6e4331562360f49be2361
https://git.kernel.org/stable/c/80824c7e527b70cf9039534e60aff592e8f209d1
https://git.kernel.org/stable/c/9a7166f0ef8cbb7bb48dd05e2471d995566003f5
https://git.kernel.org/stable/c/c3a89e3ec1ccf64fa6a34e391e1581ebbcba8683
https://lore.kernel.org/linux-cve-announce/2026042257-CVE-2026-31478-7be0@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-31478
https://www.cve.org/CVERecord?id=CVE-2026-31478