Critical Integer Wraparound Vulnerability in PostgreSQL Packages
Summary
ALPINE-CVE-2026-6473: Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. Affects postgresql17 versions < 17.10-r0. Fixed in 17.10-r0. How to fix ↓
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Background
PostgreSQL is a powerful, open-source relational database management system that uses and extends the SQL language. It is known for its robustness, extensibility, and support for advanced data types. However, certain versions of PostgreSQL are vulnerable to an integer wraparound issue that can lead to severe security risks, allowing unprivileged users to exploit the database server.
Vulnerability Detail
The vulnerability arises from an integer wraparound in multiple PostgreSQL server features, which allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This can lead to the execution of arbitrary code as the operating system user running the database. In scenarios where applications pass gigabyte-scale user inputs to the database functions, this vulnerability can result in a segmentation fault, potentially compromising the integrity and availability of the database.
How To Fix
Minimum fixed version
17.10-r0
This is the first release that contains the fix.
sudo apk add --upgrade postgresql17Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider limiting user input sizes to prevent the exploitation of this vulnerability until the package can be updated. Implement input validation to ensure that user inputs do not exceed expected limits.
Conclusion
The integer wraparound vulnerability in PostgreSQL poses significant risks to database security, allowing unprivileged users to exploit the system. It is crucial to update to the latest patched versions to mitigate these risks and ensure the integrity of your database applications.
See every vulnerability recorded for postgresql17 →
FAQ
The CVSS score of this vulnerability is 8.8, indicating a high level of severity.
Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
Exploitation of this vulnerability can lead to arbitrary code execution, segmentation faults, and potential data breaches.
Yes, Vulert can monitor and alert in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
References
Related vulnerabilities
Recent vulnerabilities recorded for postgresql17.
