AlmaLinux alert ALSA-2026:27738 (libpq)

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[Announce]  [Security Advisory] ALSA-2026:27738: libpq security update (Important)
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Tue, 23 Jun 2026 16:06:52 +0000
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<0100019ef53c06e3-b1d50024-37cf-4d6b-8973-49cc24d70b48-000000@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: Important
Release date: 2026-06-23

Summary:

The libpq package provides the PostgreSQL client library, which allows client programs to connect
to PostgreSQL servers.   

Security Fix(es):  

  * postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup
and pg_rewind (CVE-2026-6475)
  * postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack
memory (CVE-2026-6477)
  * postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password
comparison (CVE-2026-6478)
  * postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write
(CVE-2026-6473)


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-2026-27738.html

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AlmaLinux Team
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