CVE-2025-53020: Apache HTTP Server: HTTP/2 DoS by Memory Increase

Published Jul 10, 2025
·
Updated

Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server.

This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63.

Users are recommended to upgrade to version 2.4.64, which fixes the issue.

Affected Software

2 affected components
Apache HTTP Server>=2.4.17, <=2.4.63
Apache HTTP Server>=2.4.17<2.4.64

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Apache HTTP Server to a version that resolves this vulnerability.

    Fixed in 2.4.64Patch CVE-2025-53020

Event History

Jul 10, 2025
CVE Published
via MITRE·04:59 PM
Data Sourced
via MITRE·04:59 PM
DescriptionWeakness
Data Sourced
via NVD·05:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·06:01 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-53020?

CVE-2025-53020 is classified as a medium severity vulnerability impacting memory management in Apache HTTP Server.

2

How do I fix CVE-2025-53020?

To fix CVE-2025-53020, upgrade your Apache HTTP Server to version 2.4.64 or later.

3

Which versions of Apache HTTP Server are affected by CVE-2025-53020?

CVE-2025-53020 affects Apache HTTP Server versions from 2.4.17 up to 2.4.63.

4

What type of vulnerability is CVE-2025-53020?

CVE-2025-53020 is categorized as a Late Release of Memory after Effective Lifetime vulnerability.

5

Who is affected by CVE-2025-53020?

Anyone using Apache HTTP Server versions between 2.4.17 and 2.4.63 is potentially affected by CVE-2025-53020.

Company

Resources

Contact

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