CVE-2021-45100
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-45100
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-45100.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-45100
- Downstream
- Related
- Published
- 2021-12-16T05:15:08Z
- Modified
- 2025-09-19T13:28:30.466305Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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 SMB2GLOBALCAP_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.
- References