RHSA-2026:52395HighCVSS 7.5

Red Hat Security Advisory: postgresql security update

Published
August 10, 2026
Last Modified
August 31, 2026

🔗 CVE IDs covered (1)

CVE-2026-6479 →

📋 Description

CVE-2026-6479 — postgresql: PostgreSQL: Denial of Service via uncontrolled recursion in SSL/GSS negotiation

🎯 Affected products164

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-0:13.23-5.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-0:13.23-5.el9_8.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-0:13.23-5.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-0:13.23-5.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-0:13.23-5.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-contrib-debuginfo-0:13.23-5.el9_8.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-debuginfo-0:13.23-5.el9_8.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-debugsource-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • postgresql-debugsource-0:13.23-5.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • postgresql-debugsource-0:13.23-5.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +134 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Upgrade to PostgreSQL 18.4, 17.10, 16.14, 15.18, or 14.23 (matching your major version) or later. Restricting network/socket access to trusted clients reduces exposure but does not eliminate the vulnerability.

🔗 References (4)