CVE-2025-12818
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-13

Last updated on: 2025-11-13

Assigner: PostgreSQL

Description
Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes. This results in a segmentation fault for the application using libpq. Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.
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Meta Information
Published
2025-11-13
Last Modified
2025-11-13
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-15
NVD
CVE-2025-12818
EUVD
EUVD-2025-169291
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
postgresql libpq *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
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Executive Summary

This vulnerability is an integer wraparound issue in multiple PostgreSQL libpq client library functions. It allows an attacker, such as an application input provider or network peer, to cause libpq to allocate less memory than needed and then write data beyond the allocated buffer by hundreds of megabytes. This leads to a segmentation fault in the application using libpq.

Impact Analysis

The vulnerability can cause applications using the affected libpq client library versions to crash due to segmentation faults. This can lead to denial of service or instability in applications relying on PostgreSQL client connections.

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