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How the CVE Works
CVE-2025-53020 is a Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server (versions 2.4.17 to 2.4.63). The flaw occurs when the server fails to properly deallocate memory after processing certain HTTP requests, leading to memory leaks. Attackers can exploit this by sending crafted requests, causing prolonged resource exhaustion and potential denial-of-service (DoS). The vulnerability stems from improper handling of connection pools, where memory references remain active beyond their intended lifecycle.
DailyCVE Form
Platform: Apache HTTP Server
Version: 2.4.17 – 2.4.63
Vulnerability: Memory leak
Severity: Critical
Date: 07/29/2025
Prediction: Patch by 08/15/2025
What Undercode Say
Analytics:
httpd -v | grep "2.4.[17-63]" gdb -p $(pidof httpd) valgrind --leak-check=full httpd -X
How Exploit:
Crafted HTTP requests trigger memory leaks.
Example:
import requests
requests.get("http://target/", headers={"X-Malicious": "A"10000})
Protection from this CVE:
Upgrade to 2.4.64.
Disable unused modules.
Monitor memory usage.
Impact:
DoS via resource exhaustion.
Performance degradation.
Possible RCE (unconfirmed).
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
