vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2022-32230

SMBv3 FileNormalizedNameInformation NULL Pointer Dereference

HIGH
7.5
CVSS Score
Published: June 14, 2022 at 09:40 PM UTC
Updated: June 17, 2026 at 04:46 AM UTC
7 products affected across 1 vendorWindows Server 2019Windows 10Windows 11

Using Windows 10 Version 20H2 by Microsoft?

Get instant alerts when new vulnerabilities affect Windows 10 Version 20H2 - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH7.5
Exploit prediction
EPSS 7%

Description

Microsoft Windows SMBv3 suffers from a null pointer dereference in versions of Windows prior to the April, 2022 patch set. By sending a malformed FileNormalizedNameInformation SMBv3 request over a named pipe, an attacker can cause a Blue Screen of Death (BSOD) crash of the Windows kernel. For most systems, this attack requires authentication, except in the special case of Windows Domain Controllers, where unauthenticated users can always open named pipes as long as they can establish an SMB session. Typically, after the BSOD, the victim SMBv3 server will reboot.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 10· Microsoft
95%
180920h221h121h2
Windows 11· Microsoft
95%
All versions
Windows Server 2019· Microsoft
95%
All versions
Windows 10 20H2· Microsoft
60%
v < 19042.1706v < 19043.170619044.1706 ≤ v < 19043.170619044.1706
Affected range stops below 19042.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19043.1706, so it looks safe — our inference, not a vendor statement
Windows 10 21H1· Microsoft
60%
v < 19042.1706v < 19043.1706v < 19044.1706
Affected range stops below 19042.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19043.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19044.1706, so it looks safe — our inference, not a vendor statement
Windows 10 21H2· Microsoft
60%
v < 19042.1706v < 19043.1706v < 19044.1706
Affected range stops below 19042.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19043.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19044.1706, so it looks safe — our inference, not a vendor statement
Windows Server 20H2· Microsoft
60%
v < 19042.1706v < 19043.1706v < 19044.1706
Affected range stops below 19042.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19043.1706, so it looks safe — our inference, not a vendor statement
Affected range stops below 19044.1706, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/zeroSteiner/metasploit-framework/blob/feat/mod/cve-2022-32230/modules/auxiliary/dos/smb/smb_filenormalizednameinformation.rb
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-32230
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://support.microsoft.com/en-us/topic/may-10-2022-kb5013942-os-builds-19042-1706-19043-1706-and-19044-1706-60b51119-85be-4a34-9e21-8954f6749504
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.rapid7.com/blog/post/2022/06/14/cve-2022-32230-windows-smb-denial-of-service-vulnerability-fixed/

CVSS

7.5HIGHrapid7
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card