cvedb.io
CVE-2021-45100
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2021-12-16T05:15:08.827 · Last modified 2026-06-17T04:13:10.480

Summary

The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets the SMB2_GLOBAL_CAP_ENCRYPTION flag when using the SMB 3.1.1 protocol, which is a violation of the SMB protocol specification. When Windows 10 detects this protocol violation, it disables encryption.

Affected products

ksmbd_project — ksmbd

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.