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 10.0 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.
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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 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 12 more.
- < 18.5
- < 17.11
- < 16.15
- < 15.19
- < 14.24
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
- postgresql18-0:18.6-1.el10_2
- postgresql16-0:16.15-1.el10_2
- postgresql16-0:16.15-1.el10_0
- postgresql:16-8100020260910192321.489197e6
- postgresql:15-8100020260906175012.489197e6
- postgresql:12-8100020260917081510.489197e6
- postgresql:12-8040020260924163759.522a0ee4
- postgresql:12-8060020260923144955.ad008a3a
- postgresql:15-8080020260921162003.63b34585
- postgresql:12-8080020260923144922.63b34585
- postgresql:16-9080020260907191505.rhel9
- postgresql:18-9080020260914093252.rhel9
- postgresql-0:13.23-6.el9_8
- postgresql:15-9080020260903073937.rhel9
- postgresql:15-9020020260917092006.rhel9
- postgresql-0:13.23-1.el9_2.5
- postgresql:15-9040020260917091622.rhel9
- postgresql:16-9040020260922062609.rhel9
- postgresql-0:13.23-1.el9_4.4
- postgresql:16-9060020260921091101.rhel9
- postgresql-0:13.23-1.el9_6.5
- ansible-automation-platform/bootc-automation-portal-rhel9:1790657374
- rhui5/rhua-rhel9:1790242004
- RHSA-2026:67280
- RHSA-2026:70186
- RHSA-2026:72282
- RHSA-2026:69876
- RHSA-2026:69923
- RHSA-2026:69924
- RHSA-2026:73912
- RHSA-2026:72363
- RHSA-2026:70602
- RHSA-2026:72362
- RHSA-2026:67491
- RHSA-2026:67848
- RHSA-2026:69607
- RHSA-2026:69914
- RHSA-2026:70763
- RHSA-2026:72361
- RHSA-2026:70762
- RHSA-2026:70856
- RHSA-2026:72283
- RHSA-2026:70559
Official advisory · high-confidence parse· fetched 15 days 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 15 days ago·verify at source
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