AlmaLinux alert ALSA-2026:47755 (openssh)

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[Announce]  [Security Advisory] ALSA-2026:47755: openssh security update (Moderate)
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Thu, 30 Jul 2026 19:02:13 +0000
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<0100019fb467dbd8-e8649bb7-ccaf-428d-9fbd-2d663ba5c73b-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: 8
Type: Security
Severity: Moderate
Release date: 2026-07-30

Summary:

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar
operating systems. It includes the core files necessary for both the OpenSSH client and server.  

Security Fix(es):  

  * openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in AlmaLinux OpenSSH
client versions (CVE-2026-55655)
  * openssh: Double free in AlmaLinux versions of OpenSSH DH-GEX client path during FIPS
known-group validation leads to client-side denial of service (CVE-2026-55653)


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/8/ALSA-2026-47755.html

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AlmaLinux Team
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