CVE-2025-12818

MEDIUM

PostgreSQL <18.1, 17.7, 16.11, 15.15, 14.20, 13.23 - Memory Corruption

Title source: llm

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.

References (1)

[Various Sources] https://www.postgresql.org/support/security/CVE-2025-12818/

Scores

CVSS v3 5.9

EPSS 0.0005

EPSS Percentile 14.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-190

Status published

Products (6)

n/a/PostgreSQL < 13.23

n/a/PostgreSQL 14 - 14.20

n/a/PostgreSQL 15 - 15.15

n/a/PostgreSQL 16 - 16.11

n/a/PostgreSQL 17 - 17.7

n/a/PostgreSQL 18 - 18.1

Published Nov 13, 2025

Tracked Since Feb 18, 2026