CyberRota Analysis
This is a critical severity vulnerability with a CVSS score of 9.8. It affects Linux.
CVE
CVE-2026-31478
Severity
CRITICAL
CVSS
9.8
EPSS
0.50%
Linux
Original NVD Description
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.
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