CVE-2025-4207 (CVSS 5.9)

Description

Buffer over-read in PostgreSQL GB18030 encoding validation allows a database input provider to achieve temporary denial of service on platforms where a 1-byte over-read can elicit process termination. This affects the database server and also libpq. Versions before PostgreSQL 17.5, 16.9, 15.13, 14.18, and 13.21 are affected.

Is your site exposed to CVE-2025-4207?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.9

MEDIUM

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

Weakness Type (CWE)

CWE-126 CWE-126

References

Other References

https://www.postgresql.org/support/security/CVE-2025-4207/ http://www.openwall.com/lists/oss-security/2025/05/09/3 https://lists.debian.org/debian-lts-announce/2025/05/msg00011.html

Frequently Asked Questions

What is CVE-2025-4207? +

Buffer over-read in PostgreSQL GB18030 encoding validation allows a database input provider to achieve temporary denial of service on platforms where a 1-byte over-read can elicit process termination. This affects the database server and also libpq. Versions before PostgreSQL 17.5, 16.9, 15.13, 14.18, and 13.21 are affected. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2025-4207? +

CVE-2025-4207 has a CVSS v3.1 score of 5.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-4207? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2024-12975

A buffer overread can occur in the CPC application when operating in full duplex SPI upon receiving an invalid packet …

CVE-2026-41898 9.8

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.24 to before 0.10.78, the FFI trampolines behind SslContextBuilder::set_psk_client_callback, set_psk_server_callback, …

CVE-2017-17772 9.8

In multiple functions that process 802.11 frames, out-of-bounds reads can occur due to insufficient validation.

CVE-2024-38373 9.6

FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a buffer over-read issue in the …

CVE-2023-51773 9.1

BACnet Stack before 1.3.2 has a decode function APDU buffer over-read in bacapp_decode_application_data in bacapp.c.

CVE-2025-55081 9.1

In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the _nx_secure_tls_process_clienthello() function was missing length verification of certain …

CVE-2025-4207