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High8.8Red Hat Linux

High [CVE-2026-6473] integer overflow can cause an undersized allocation and an out-of-bounds write

This high-severity Red Hat Linux advisory covers CVE-2026-6473 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

CVE-2026-6473 Published May 14, 2026
CVE-2026-6473
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

integer overflow can cause an undersized allocation and an out-of-bounds write. Red Hat rates this important (CVSS 8.8).

Weakness: CWE-190. Affected package(s): postgresql, postgresql:12, postgresql:18, postgresql:15, libpq, postgresql16.

Resolved in Red Hat advisory RHSA-2026:26561 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 10 more.

Affected versions
  • postgresql-0:13.23-1.el9_4.2
  • postgresql:12-8080020260626093604.63b34585
  • postgresql-0:13.23-1.el9_2.2
  • postgresql:18-9080020260605125734.rhel9
  • postgresql:15-9040020260616071806.rhel9
  • postgresql-0:13.23-1.el9_6.2
  • libpq-0:13.23-1.el8_8.1
  • postgresql:15-9080020260605124405.rhel9
  • postgresql:15-9060020260622062902.rhel9
  • postgresql-0:13.23-3.el9_8
  • postgresql16-0:16.14-1.el10_2
  • postgresql:15-8100020260605152259.489197e6

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:26561

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:26561 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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