CVE-2021-3038

GlobalProtect App: Windows VPN kernel driver denial of service (DoS)

Description

A denial-of-service (DoS) vulnerability in Palo Alto Networks GlobalProtect app on Windows systems allows a limited Windows user to send specifically-crafted input to the GlobalProtect app that results in a Windows blue screen of death (BSOD) error. This issue impacts: GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.8; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.4.

Remediation

Solution:

  • This issue is fixed in GlobalProtect app 5.1.8, GlobalProtect app 5.2.4, and all later GlobalProtect app versions.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory paloaltonetworks.com
Affected: Palo Alto Networks GlobalProtect App
Published at:
Updated at:

References

Link Tags
https://security.paloaltonetworks.com/CVE-2021-3038 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3038?
CVE-2021-3038 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3038?
To fix CVE-2021-3038: This issue is fixed in GlobalProtect app 5.1.8, GlobalProtect app 5.2.4, and all later GlobalProtect app versions.
Is CVE-2021-3038 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3038 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3038?
CVE-2021-3038 affects Palo Alto Networks GlobalProtect App.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.