CVE-2025-12818: PostgreSQL libpq undersizes allocations, via integer wraparound

Overview

Severity

Medium (CVSS 5.9)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2025-Nov

Released

2025-11-14

Last Updated

2026-03-04

EPSS Score

0.10% (percentile: 26.7%)

Affected Products (6)

Other

• 20865-17084
• 20744-17084
• 20822-17084
• 20964-17084

Open Source Software

• azl3 postgresql 16.10-1 on Azure Linux 3.0
• cbl2 postgresql 14.19-1 on CBL Mariner 2.0

Revision History

• 2025-11-14: Information published.
• 2026-01-21: Information published.
• 2026-02-18: Information published.
• 2026-03-04: Information published.