High severity7.5NVD Advisory· Published Dec 16, 2021· Updated Jun 17, 2026
CVE-2021-45100
CVE-2021-45100
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
12- cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
- Linux kernel/ksmbd serverdescription
Patches
Vulnerability mechanics
References
4- github.com/cifsd-team/ksmbd/pull/551nvdPatchThird Party Advisory
- github.com/cifsd-team/ksmbd/issues/550nvdThird Party Advisory
- marc.infonvdThird Party Advisory
- security.netapp.com/advisory/ntap-20220107-0001/nvdThird Party Advisory
News mentions
0No linked articles in our index yet.