CVE-2021-45100

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-319

Affected software

No affected versions have been published.

Timeline

Published
Dec 16, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-45100: High severity, CVSS 7.5 | Vulnix