RHSA-2026:49908: 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 x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 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 ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
redhat/libpq<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-debuginfo<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-debuginfo<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-debugsource<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-debugsource<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-devel<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-devel<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-devel-debuginfo<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-devel-debuginfo<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-debuginfo<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-debugsource<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-devel<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq-devel-debuginfo<13.23-1.el9_2.1
13.23-1.el9_2.1
redhat/libpq<13.23-1.el9_2.1.aa
13.23-1.el9_2.1.aa
redhat/libpq-debuginfo<13.23-1.el9_2.1.aa
13.23-1.el9_2.1.aa
redhat/libpq-debugsource<13.23-1.el9_2.1.aa
13.23-1.el9_2.1.aa
redhat/libpq-devel<13.23-1.el9_2.1.aa
13.23-1.el9_2.1.aa
redhat/libpq-devel-debuginfo<13.23-1.el9_2.1.aa
13.23-1.el9_2.1.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_2.1
  2. Upgrade

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

    Fixed in 13.23-1.el9_2.1
  3. Upgrade

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

    Fixed in 13.23-1.el9_2.1
  4. Upgrade

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

    Fixed in 13.23-1.el9_2.1
  5. Upgrade

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

    Fixed in 13.23-1.el9_2.1
  6. Upgrade

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

    Fixed in 13.23-1.el9_2.1.aa
  7. Upgrade

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

    Fixed in 13.23-1.el9_2.1.aa
  8. Upgrade

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

    Fixed in 13.23-1.el9_2.1.aa
  9. Upgrade

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

    Fixed in 13.23-1.el9_2.1.aa
  10. Upgrade

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

    Fixed in 13.23-1.el9_2.1.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-2026:49908?

The severity of RHSA-2026:49908 is classified as high with a score of 7.

2

What security issue does RHSA-2026:49908 address?

RHSA-2026:49908 addresses a buffer overflow vulnerability in the PostgreSQL libpq that allows a server superuser to overwrite client stack memory.

3

How do I fix RHSA-2026:49908?

To resolve RHSA-2026:49908, ensure that you update the affected libpq packages to the latest version provided by Red Hat.

4

Which systems are affected by RHSA-2026:49908?

Affected systems include Red Hat Enterprise Linux for x86_64, including Update Services for SAP Solutions and Extended Life Cycle.

5

Is this vulnerability, RHSA-2026:49908, exploitable remotely?

Yes, the buffer overflow in RHSA-2026:49908 can potentially be exploited remotely by malicious actors with superuser access.

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