RHSA-2026:49909HighCVSS 8.4

Red Hat Security Advisory: libpq security update

Published
August 4, 2026
Last Modified
August 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-6477 →

📋 Description

CVE-2026-6477 — postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory

🎯 Affected products27

  • Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-0:13.23-1.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-0:13.23-1.el9_4.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-0:13.23-1.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-0:13.23-1.el9_4.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-0:13.23-1.el9_4.1.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-0:13.23-1.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debuginfo-0:13.23-1.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debuginfo-0:13.23-1.el9_4.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debuginfo-0:13.23-1.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debuginfo-0:13.23-1.el9_4.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debuginfo-0:13.23-1.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debugsource-0:13.23-1.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debugsource-0:13.23-1.el9_4.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debugsource-0:13.23-1.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debugsource-0:13.23-1.el9_4.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-debugsource-0:13.23-1.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-0:13.23-1.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-0:13.23-1.el9_4.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-0:13.23-1.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-0:13.23-1.el9_4.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-0:13.23-1.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-debuginfo-0:13.23-1.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-debuginfo-0:13.23-1.el9_4.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-debuginfo-0:13.23-1.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-debuginfo-0:13.23-1.el9_4.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • libpq-devel-debuginfo-0:13.23-1.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)

✅ 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: Only connect to trusted PostgreSQL servers. Avoid using psql or pg_dump against untrusted or potentially compromised database servers.

🔗 References (4)