CVE-2025-53020

Apache HTTP Server: HTTP/2 DoS by Memory Increase

CVSS 7.5 HIGHEPSS 4.4%CWE-401

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.

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

Affected products

Apache Software Foundation · Apache HTTP Server

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References

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