CVE-2025-53020

Apache HTTP Server: HTTP/2 DoS by Memory Increase

State: Published
Severity: 7.5 High
Published: Jul 10, 2025
Updated: Nov 4, 2025
Reserved: Jun 24, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
Apache HTTP ServerApache Software Foundation	2.4.17 through 2.4.63Affected

References

https://httpd.apache.org/security/vulnerabilities_24.htmlvendor-advisory
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html
http://www.openwall.com/lists/oss-security/2025/07/10/10

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.