CVE-2025-12818
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.
Version Information
| Affected branch | Introduced | Fixed In | Fix Published |
|---|---|---|---|
| 13 | — | 13.23 | 2025-11-13 |
| 14 | — | 14.20 | 2025-11-13 |
| 15 | — | 15.15 | 2025-11-13 |
| 16 | — | 16.11 | 2025-11-13 |
| 17 | — | 17.7 | 2025-11-13 |
| 18 | — | 18.1 | 2025-11-13 |
CVSS 3.0
| Overall Score | 5.9 |
|---|---|
| Component | core server |
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
First published: 2025-11-13
Historical source observations
These dated records preserve the original source claims separately from the reviewed fix list.
center · 2026-10-03 12:08:35.169032+08
- PostgreSQL 18 · Original minor coordinate: 1
- PostgreSQL 17 · Original minor coordinate: 7
- PostgreSQL 16 · Original minor coordinate: 11
- PostgreSQL 15 · Original minor coordinate: 15
- PostgreSQL 14 · Original minor coordinate: 20
- PostgreSQL 13 · Original minor coordinate: 23
pgweb · 2026-10-03 12:08:55.967155+08
- PostgreSQL 18 · Original minor coordinate: 1
- PostgreSQL 17 · Original minor coordinate: 7
- PostgreSQL 16 · Original minor coordinate: 11
- PostgreSQL 15 · Original minor coordinate: 15
- PostgreSQL 14 · Original minor coordinate: 20
- PostgreSQL 13 · Original minor coordinate: 23