High [CVE-2026-14670] Arbitrary code execution via plperl tied hash heap buffer overflow
This high-severity Red Hat Linux advisory covers CVE-2026-14670 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
Heap buffer overflow in PostgreSQL plperl return of a tied hash allows the function owner to execute arbitrary code as the operating system user running the database, via a crafted function body. 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 unauthorized access and control over the database system.
By crafting a malicious function body, an attacker with low privileges can exploit a heap buffer overflow, leading to full compromise of the database system. 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-805.
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 11 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-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-2026:72361
- RHSA-2026:70762
- RHSA-2026:70856
- RHSA-2026:72283
- RHSA-2026:70559
- RHSA-2026:72281
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
Mitigation checklist
- Disable the plperl procedural language if it is not actively required by executing DROP LANGUAGE plperl; on affected databases. Alternatively, restrict access by revoking USAGE privileges on plperl from untrusted roles. These actions prevent the execution of crafted plperl functions, mitigating the risk(a database restart may be required to clear active sessions).
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
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