CVE-2025-12818

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.

How to fix CVE-2025-12818

To remediate CVE-2025-12818, upgrade the affected package to a fixed version below.

—upgrade to 15.15-r0 or later
—upgrade to 16.11-r0 or later
—upgrade to 17.7-r0 or later
—upgrade to 18.1-r0 or later
—upgrade to 13.23.0 or later
—upgrade to 13.23-0+deb11u1 or later
—upgrade to 15.15-0+deb12u1 or later
—upgrade to 17.7-0+deb13u1 or later
—upgrade to 18.1-1 or later

Is CVE-2025-12818 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (9)

from 0, < 15.15-r0
from 0, < 16.11-r0
from 0, < 17.7-r0
from 0, < 18.1-r0
from 0, < 13.23.0, >= 14.0.0, < 14.20.0, >= 15.0.0, < 15.15.0, >= 16.0.0, < 16.11.0, >= 17.0.0, < 17.7.0, >= 18.0.0, < 18.1.0
from 0, < 13.23-0+deb11u1
from 0, < 15.15-0+deb12u1
from 0, < 17.7-0+deb13u1
from 0, < 18.1-1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H