High [CVE-2026-16238] Arbitrary code execution via type confusion in pg_restore_attribute_stats
This high-severity Red Hat Linux advisory covers CVE-2026-16238 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: postgresql18.
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Summary
Type confusion in PostgreSQL pg_restore_attribute_stats() allows an object creator to execute arbitrary code as the operating system user running the database, via conflation of range and multirange values. Within major version 18, minor versions before PostgreSQL 18.5 are affected.
A flaw was found in PostgreSQL. This could lead to a complete compromise of the database system.
Note: Red Hat Enterprise Linux 9.6 and earlier releases do not ship the vulnerable PostgreSQL major version (18.x) and are therefore not affected. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Weakness: CWE-843. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Self-service automation portal 2 as not affected.
Red Hat fixing advisory: RHSA-2026:67280, RHSA-2026:67848.
Affected products named by the advisory: Red Hat package: postgresql18.
- < 18.5
Official advisory · high-confidence parse· fetched 20 days ago·verify at source
- postgresql18-0:18.6-1.el10_2
- postgresql:18-9080020260914093252.rhel9
- RHSA-2026:67280
- RHSA-2026:67848
Official advisory · high-confidence parse· fetched 20 days ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict the ability to create database objects and perform database restorations to only highly trusted administrative users. This operational control limits the attack surface by ensuring that only authorized personnel can introduce potentially malicious objects into the database environment. Carefully manage user privileges to enforce this restriction.
Official advisory · high-confidence parse· fetched 20 days ago·verify at source
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