AlmaLinux alert ALSA-2026:22551 (mod_http2)

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[Announce]  [Security Advisory] ALSA-2026:22551: mod_http2 security update (Moderate)
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Thu, 04 Jun 2026 12:05:22 +0000
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<0100019e92861b91-8d0bb7d7-9a77-4a88-ae29-043e476548a1-000000@email.amazonses.com>
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Article
Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata
notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-06-04

Summary:

The mod_h2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on top of libnghttp2 for
httpd 2.4 servers.  

Security Fix(es):  

  * httpd: Apache HTTP Server: HTTP/2 DoS by Memory Increase (CVE-2025-53020)


For more details about the security issue(s), including the impact, a CVSS score, acknowledgments,
and other related information, refer to the CVE page(s) listed in the References section.


Full details, updated packages, references, and other related information:
https://errata.almalinux.org/9/ALSA-2026-22551.html

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AlmaLinux Team
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