Moderate Security Vulnerability in PostgreSQL Packages: CVE-2025-12818
Summary
ALSA-2026:0525: Moderate: postgresql16 security update. Affects postgresql versions < 16.11-1.el10_1. Fixed in 16.11-1.el10_1. How to fix ↓
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Background
PostgreSQL is an advanced Object-Relational Database Management System (DBMS) known for its robustness, extensibility, and compliance with SQL standards. It provides a wide range of functionalities, including support for complex queries, transactions, and concurrency. The affected packages include postgresql, postgresql-contrib, postgresql-docs, and others, which are essential for accessing and managing PostgreSQL databases. The vulnerability identified as CVE-2025-12818 arises from an issue in the libpq library, which is responsible for client-server communication.
Vulnerability Detail
The vulnerability in PostgreSQL, identified as CVE-2025-12818, is caused by undersized allocations in the libpq library, leading to potential integer wraparound. This flaw can be exploited by an attacker to cause unexpected behavior in the database management system, potentially leading to data corruption or unauthorized access. The severity of this vulnerability is classified as moderate, indicating that while it may not lead to immediate catastrophic failures, it poses a significant risk if left unaddressed.
How To Fix
Minimum fixed version
16.11-1.el10_1
This is the first release that contains the fix.
sudo dnf update postgresqlTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the PostgreSQL server and ensure that only trusted clients can connect. This can be achieved by configuring the pg_hba.conf file to restrict connections based on IP addresses or using firewall rules to block unauthorized access.
Conclusion
The PostgreSQL vulnerability CVE-2025-12818 poses a moderate risk due to undersized allocations in the libpq library. It is crucial for users to update their PostgreSQL packages to the patched version 16.11-1.el10_1 to mitigate potential risks. Additionally, implementing access restrictions can serve as a temporary workaround until the update is applied.
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FAQ
CVE-2025-12818 is a security vulnerability in PostgreSQL that arises from undersized allocations in the libpq library, potentially leading to integer wraparound.
You can check if your PostgreSQL installation is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities without requiring installation.
The risks include potential data corruption, unauthorized access, and unexpected behavior in the database management system.
You can update your PostgreSQL packages by running the command 'sudo dnf update postgresql postgresql-contrib postgresql-docs ...' in your terminal.
Yes, you can limit access to the PostgreSQL server by configuring the pg_hba.conf file and using firewall rules to restrict connections.
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