High [CVE-2026-14671] Arbitrary code execution via type confusion in 'refint' module
This high-severity Red Hat Linux advisory covers CVE-2026-14671 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operating system user running the database. The fix for this emerged as a non-security bug report, and the fix appear in the git repository with subject "refint: Remove plan cache.", without a CVE number.
Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. A flaw was found in PostgreSQL.
This could lead to a complete compromise of the database server. 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. Affected Red Hat products: 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; Self-service automation portal 2.
Red Hat lists Red Hat Hardened Images as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: postgresql16; Red Hat package: postgresql18.
- < 18.5
- < 17.11
- < 16.15
- < 15.19
- < 14.24
Official advisory · high-confidence parse· fetched 55 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 55 minutes ago·verify at source
Mitigation checklist
- To mitigate this vulnerability, administrators should avoid installing the refint module and remove it if it is currently deployed by executing DROP EXTENSION refint; as a database superuser. Additionally, enforcing the principle of least privilege by revoking CREATE permissions on databases from untrusted users prevents them from creating the malicious objects necessary to exploit this flaw.
Official advisory · high-confidence parse· fetched 55 minutes ago·verify at source
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