RHSA-2026:50863: Important: libpq security update

Published Aug 5, 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

28 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
redhat/libpq<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-debuginfo<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-debugsource<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-devel<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-devel-debuginfo<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-debuginfo<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-debugsource<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-devel<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-devel-debuginfo<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-debuginfo<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-debugsource<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-devel<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq-devel-debuginfo<16.14-0.el10_0.1
16.14-0.el10_0.1
redhat/libpq<16.14-0.el10_0.1.aa
16.14-0.el10_0.1.aa
redhat/libpq-debuginfo<16.14-0.el10_0.1.aa
16.14-0.el10_0.1.aa
redhat/libpq-debugsource<16.14-0.el10_0.1.aa
16.14-0.el10_0.1.aa
redhat/libpq-devel<16.14-0.el10_0.1.aa
16.14-0.el10_0.1.aa
redhat/libpq-devel-debuginfo<16.14-0.el10_0.1.aa
16.14-0.el10_0.1.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 16.14-0.el10_0.1
  2. Upgrade

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

    Fixed in 16.14-0.el10_0.1
  3. Upgrade

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

    Fixed in 16.14-0.el10_0.1
  4. Upgrade

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

    Fixed in 16.14-0.el10_0.1
  5. Upgrade

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

    Fixed in 16.14-0.el10_0.1
  6. Upgrade

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

    Fixed in 16.14-0.el10_0.1.aa
  7. Upgrade

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

    Fixed in 16.14-0.el10_0.1.aa
  8. Upgrade

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

    Fixed in 16.14-0.el10_0.1.aa
  9. Upgrade

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

    Fixed in 16.14-0.el10_0.1.aa
  10. Upgrade

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

    Fixed in 16.14-0.el10_0.1.aa
  11. Compensating control

    Because this is a libpq (PostgreSQL client library) buffer overflow (CVE-2026-6477) that can allow server superuser to overwrite client stack memory, limit exposure of applications using the libpq package: restrict who can trigger server-side superuser actions that interact with vulnerable client code paths.

Event History

Aug 5, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·05:46 PM
Data Sourced
via Red Hat·05:46 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:50863?

The severity of RHSA-2026:50863 is classified as high with a score of 7.

2

What does RHSA-2026:50863 address?

RHSA-2026:50863 addresses a security update for the libpq library in Red Hat Enterprise Linux.

3

How do I fix RHSA-2026:50863?

To fix RHSA-2026:50863, you should apply the latest security update provided for the affected Red Hat Enterprise Linux versions.

4

Which systems are affected by RHSA-2026:50863?

RHSA-2026:50863 affects various architectures of Red Hat Enterprise Linux including x86_64, ARM 64, IBM z Systems, and Power little endian.

5

When was RHSA-2026:50863 published?

RHSA-2026:50863 was published on August 5, 2026.

Company

Resources

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RHSA-2026:50863 - Important: libpq security update - SecAlerts