CVE-2026-64389: ksmbd: validate NTLMv2 response before updating session key

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-26

Last Updated

2026-08-07

EPSS Score

0.45% (percentile: 38.1%)

Affected Products (1)

Other

• 21580-17084

Revision History

• 2026-07-26: Information published.
• 2026-07-27: Information published.
• 2026-08-07: Information published.