RHSA-2026:42555: Important: postgresql:13 security update

Published Jul 21, 2026
·
Updated

Important: postgresql:13 security update

Other sources

PostgreSQL is an advanced object-relational database management system (DBMS).Security Fix(es): postgresql: PostgreSQL: Operating system account hijack via symlink following in pgbasebackup and pgrewind (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.

— Red Hat

Affected Software

68 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life
Red Hat Red Hat Enterprise Linux Server - TUS
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
redhat/pgaudit<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgresql<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/pgaudit<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/pgaudit-debuginfo<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/pgaudit-debugsource<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs-debuginfo<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs-debugsource<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgresql<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-contrib<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-contrib-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-debugsource<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-docs<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-docs-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plperl<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plperl-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plpython3<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plpython3-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-pltcl<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-pltcl-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server-devel<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server-devel-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-static<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-test<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-test-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-test-rpm-macros<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade-devel<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade-devel-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/pgaudit<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/pgaudit-debuginfo<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/pgaudit-debugsource<1.5.0-1.module+el8.4.0+8873+b821c30a
1.5.0-1.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs-debuginfo<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgres-decoderbufs-debugsource<0.10.0-2.module+el8.4.0+8873+b821c30a
0.10.0-2.module+el8.4.0+8873+b821c30a
redhat/postgresql<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-contrib<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-contrib-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-debugsource<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-docs<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-docs-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plperl<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plperl-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plpython3<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-plpython3-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-pltcl<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-pltcl-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server-devel<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-server-devel-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-static<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-test<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-test-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade-devel<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2
redhat/postgresql-upgrade-devel-debuginfo<13.23-1.module+el8.8.0+24513+386abafd.2
13.23-1.module+el8.8.0+24513+386abafd.2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 1.5.0-1.module+el8.4.0+8873+b821c30a
  2. Upgrade

    Upgrade redhat/postgres-decoderbufs to a version that resolves this vulnerability.

    Fixed in 0.10.0-2.module+el8.4.0+8873+b821c30a
  3. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  4. Upgrade

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

    Fixed in 1.5.0-1.module+el8.4.0+8873+b821c30a
  5. Upgrade

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

    Fixed in 1.5.0-1.module+el8.4.0+8873+b821c30a
  6. Upgrade

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

    Fixed in 0.10.0-2.module+el8.4.0+8873+b821c30a
  7. Upgrade

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

    Fixed in 0.10.0-2.module+el8.4.0+8873+b821c30a
  8. Upgrade

    Upgrade redhat/postgresql-contrib to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  9. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  10. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  11. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  12. Upgrade

    Upgrade redhat/postgresql-docs to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  13. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  14. Upgrade

    Upgrade redhat/postgresql-plperl to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  15. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  16. Upgrade

    Upgrade redhat/postgresql-plpython3 to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  17. Upgrade

    Upgrade redhat/postgresql-plpython3-debuginfo to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  18. Upgrade

    Upgrade redhat/postgresql-pltcl to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  19. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  20. Upgrade

    Upgrade redhat/postgresql-server to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  21. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  22. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  23. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  24. Upgrade

    Upgrade redhat/postgresql-static to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  25. Upgrade

    Upgrade redhat/postgresql-test to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  26. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  27. Upgrade

    Upgrade redhat/postgresql-test-rpm-macros to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  28. Upgrade

    Upgrade redhat/postgresql-upgrade to a version that resolves this vulnerability.

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  29. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  30. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  31. Upgrade

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

    Fixed in 13.23-1.module+el8.8.0+24513+386abafd.2
  32. Upgrade

    Upgrade postgresql:13 to a version that resolves this vulnerability.

    Fixed in 13
  33. Upgrade

    Upgrade postgresql to a version that resolves this vulnerability.

    Patch CVE-2026-6477
  34. Upgrade

    Upgrade postgresql to a version that resolves this vulnerability.

    Patch CVE-2026-6478
  35. Upgrade

    Upgrade postgresql to a version that resolves this vulnerability.

    Patch CVE-2026-6473
  36. Upgrade

    Upgrade postgresql to a version that resolves this vulnerability.

    Patch CVE-2026-6475

Event History

Jul 21, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·06:14 AM
Data Sourced
via Red Hat·06:14 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:42555?

The severity of RHSA-2026:42555 is categorized as high, with a score of 7.

2

How do I fix RHSA-2026:42555?

To fix RHSA-2026:42555, update your PostgreSQL packages to the latest version as specified in the security advisory.

3

What vulnerabilities are addressed in RHSA-2026:42555?

RHSA-2026:42555 addresses a security vulnerability related to operating system account hijack via symlink in pg_basebackup and pg_rewind (CVE-2026-6475).

4

Which software products are affected by RHSA-2026:42555?

The affected software products include redhat/pgaudit, redhat/postgres-decoderbufs, and redhat/postgresql among others.

5

What type of vulnerabilities are associated with RHSA-2026:42555?

RHSA-2026:42555 is associated with Buffer Overflow and Integer Overflow vulnerabilities.

Company

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