CVE-2025-12818 | BDVDB-2026-301913 Detail

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.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-190 Integer Overflow or Wraparound

References#

https://www.postgresql.org/support/security/CVE-2025-12818/

Exploit#

No public exploit known

History#

Version 12025-11-13Record published in the CVE List.

Published

Published: 2025-11-13
Last modified: 2025-11-13

Vendor information

Vendor: Not stated
Product: PostgreSQL

Score

5.9 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 30.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 18 and < 18.1
Fixed
18.1
Vulnerable
>= 17 and < 17.7
Fixed
17.7
Vulnerable
>= 16 and < 16.11
Fixed
16.11
Vulnerable
>= 15 and < 15.15
Fixed
15.15
Vulnerable
>= 14 and < 14.20
Fixed
14.20
Vulnerable
< 13.23
Fixed
13.23

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.9 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).