CVE-2026-31478
ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 22, 2026 |
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Affected Versions
Linux / Linux
f2283680a80571ca82d710bc6ecd8f8beac67d63 < 70b4c414889492c522b6e4331562360f49be2361 9f297df20d93411c0b4ddad7f88ba04a7cd36e77 < 9a7166f0ef8cbb7bb48dd05e2471d995566003f5 e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d < c3a89e3ec1ccf64fa6a34e391e1581ebbcba8683 e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d < 6aef1765d6807e0f027cd87f6ac973eb0879a46d e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d < 80824c7e527b70cf9039534e60aff592e8f209d1 e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d < 4cb537ae4f37d7d0f617815ed4bed7173fb50861 e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d < 0e55f63dd08f09651d39e1b709a91705a8a0ddcb
Linux / Linux
6.6
References
git.kernel.org: https://git.kernel.org/stable/c/70b4c414889492c522b6e4331562360f49be2361 git.kernel.org: https://git.kernel.org/stable/c/9a7166f0ef8cbb7bb48dd05e2471d995566003f5 git.kernel.org: https://git.kernel.org/stable/c/c3a89e3ec1ccf64fa6a34e391e1581ebbcba8683 git.kernel.org: https://git.kernel.org/stable/c/6aef1765d6807e0f027cd87f6ac973eb0879a46d git.kernel.org: https://git.kernel.org/stable/c/80824c7e527b70cf9039534e60aff592e8f209d1 git.kernel.org: https://git.kernel.org/stable/c/4cb537ae4f37d7d0f617815ed4bed7173fb50861 git.kernel.org: https://git.kernel.org/stable/c/0e55f63dd08f09651d39e1b709a91705a8a0ddcb