Windows iSCSI Discovery Service Denial of Service Vulnerability

According to the CVSS metric, successful exploitation of this vulnerability could lead to total loss of availability (A:H)? What does that mean for this vulnerability?
An attacker could impact availability of the service resulting in Denial of Service (DoS).

Security updates
10.0.17763.4010 — https://support.microsoft.com/help/5022840
10.0.20348.1547 — https://support.microsoft.com/help/5022842
10.0.20348.1540 — https://support.microsoft.com/help/5022921
10.0.19042.2604 — https://support.microsoft.com/help/5022834
10.0.22621.1574 — https://support.microsoft.com/help/5022836
10.0.22621.1265 — https://support.microsoft.com/help/5022845
10.0.10240.19747 — https://support.microsoft.com/help/5022858
10.0.14393.5717 — https://support.microsoft.com/help/5022838
6.0.6003.21915 — https://support.microsoft.com/help/5022890
6.0.6003.21915 — https://support.microsoft.com/help/5022893
6.1.7601.26366 — https://support.microsoft.com/help/5022872
6.1.7601.26366 — https://support.microsoft.com/help/5022874
6.2.9200.24116 — https://support.microsoft.com/help/5022903
6.2.9200.24116 — https://support.microsoft.com/help/5022895
6.3.9600.20821 — https://support.microsoft.com/help/5022899
6.3.9600.20821 — https://support.microsoft.com/help/5022894