CRITICAL 9.8 Microsoft
CVE-2026-31478
ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
Microsoft Security Update 2026-Apr: ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
Affected Products
- cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31478
- https://nvd.nist.gov/vuln/detail/CVE-2026-31478
This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-04-14 via Microsoft. Affected: cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0.
Risk Timeline
CVE Disclosed2026-04-14 · 207 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31478NVD / MITRE
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