Memory Leak Affecting mod_http2 package, versions <0:2.0.26-6.el9_8


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
4.96% (92nd percentile)

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  • Snyk IDSNYK-ALMALINUX9-MODHTTP2-17184046
  • published5 Jun 2026
  • disclosed2 Jun 2026

Introduced: 2 Jun 2026

CVE-2025-53020  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 mod_http2 to version 0:2.0.26-6.el9_8 or higher.
This issue was patched in ALSA-2026:22551.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_http2 package and not the mod_http2 package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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 Base Scores

version 3.1