RHSA-2026:49909: Important: libpq security update

Published Aug 4, 2026
·
Updated

Important: libpq security update

Other sources

The libpq package provides the PostgreSQL client library, which allows client programs to connect to PostgreSQL servers. Security Fix(es): postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477) 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.

— Red Hat

Affected Software

29 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
redhat/libpq<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-debuginfo<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-debuginfo<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-debugsource<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-debugsource<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-devel<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-devel<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-devel-debuginfo<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-devel-debuginfo<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-debuginfo<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-debugsource<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-devel<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq-devel-debuginfo<13.23-1.el9_4.1
13.23-1.el9_4.1
redhat/libpq<13.23-1.el9_4.1.aa
13.23-1.el9_4.1.aa
redhat/libpq-debuginfo<13.23-1.el9_4.1.aa
13.23-1.el9_4.1.aa
redhat/libpq-debugsource<13.23-1.el9_4.1.aa
13.23-1.el9_4.1.aa
redhat/libpq-devel<13.23-1.el9_4.1.aa
13.23-1.el9_4.1.aa
redhat/libpq-devel-debuginfo<13.23-1.el9_4.1.aa
13.23-1.el9_4.1.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/libpq to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1
  2. Upgrade

    Upgrade redhat/libpq-debuginfo to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1
  3. Upgrade

    Upgrade redhat/libpq-debugsource to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1
  4. Upgrade

    Upgrade redhat/libpq-devel to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1
  5. Upgrade

    Upgrade redhat/libpq-devel-debuginfo to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1
  6. Upgrade

    Upgrade redhat/libpq to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1.aa
  7. Upgrade

    Upgrade redhat/libpq-debuginfo to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1.aa
  8. Upgrade

    Upgrade redhat/libpq-debugsource to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1.aa
  9. Upgrade

    Upgrade redhat/libpq-devel to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1.aa
  10. Upgrade

    Upgrade redhat/libpq-devel-debuginfo to a version that resolves this vulnerability.

    Fixed in 13.23-1.el9_4.1.aa
  11. Upgrade

    Upgrade postgresql/libpq to a version that resolves this vulnerability.

    Patch CVE-2026-6477

Event History

Aug 4, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·05:58 AM
Data Sourced
via Red Hat·05:58 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:49909?

The severity of RHSA-2026:49909 is rated as high, specifically a score of 7.

2

What vulnerabilities are addressed in RHSA-2026:49909?

RHSA-2026:49909 addresses a buffer overflow vulnerability in the libpq package that could allow a server superuser to overwrite client stack memory.

3

How do I fix RHSA-2026:49909?

To fix RHSA-2026:49909, you should update the libpq package to the latest version provided by Red Hat.

4

Which systems are affected by RHSA-2026:49909?

RHSA-2026:49909 affects multiple versions of Red Hat Enterprise Linux including ARM 64 and IBM z Systems.

5

What is the impact of the vulnerability in RHSA-2026:49909?

The impact of the vulnerability in RHSA-2026:49909 could lead to unauthorized access or manipulation of client stack memory if exploited.

Company

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