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CVE-2025-12818

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Date: November 13, 2025

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.

Severity Score

Related Resources (3)

https://www.postgresql.org/support/security/CVE-2025-12818/
https://nvd.nist.gov/vuln/detail/CVE-2025-12818
https://www.mend.io/vulnerability-database/CVE-2025-12818

Severity Score

Weakness Type (CWE)

Integer Overflow or Wraparound

CWE-190

Top Fix

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Upgrade Version

Upgrade to version https://github.com/postgres/postgres.git - REL_13_23;https://github.com/postgres/postgres.git - REL_14_20;https://github.com/postgres/postgres.git - REL_15_15;https://github.com/postgres/postgres.git - REL_16_11;https://github.com/postgres/postgres.git - REL_17_7;https://github.com/postgres/postgres.git - REL_18_1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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