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High8.8Red Hat Linux

High [CVE-2026-2006] PostgreSQL missing validation of multibyte character length executes arbitrary code

This high-severity Red Hat Linux advisory covers CVE-2026-2006 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

CVE-2026-2006 Published Feb 12, 2026
CVE-2026-2006
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

PostgreSQL missing validation of multibyte character length executes arbitrary code. Red Hat rates this important (CVSS 8.8).

Weakness: CWE-1285. Affected package(s): postgresql, postgresql:16, postgresql:15, postgresql18-main, rhui5/rhua-rhel9:1773670137, postgresql:13.

Resolved in Red Hat advisory RHSA-2026:4516 — 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 8.2 Advanced 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; and 11 more.

Affected versions
  • postgresql-0:13.23-1.el9_6.1
  • postgresql:16-9040020260306102041.rhel9
  • postgresql-0:13.23-1.el9_4.1
  • postgresql:15-9020020260309133405.rhel9
  • postgresql:16-8100020260227221401.489197e6
  • postgresql18-main-18.3-1.2.hum1
  • rhui5/rhua-rhel9:1773670137
  • postgresql:13-8060020260309111524.ad008a3a
  • postgresql:16-9060020260305153549.rhel9
  • postgresql-0:13.23-1.el9_2.1
  • postgresql-0:13.23-1.el9_0.1
  • postgresql:15-9060020260309125703.rhel9

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

Fixed versions
  • RHSA-2026:4516

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-2026:4516 (`sudo dnf update` / `yum update`).

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

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