--- title: "CVE-2025-4207\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2025-4207?format=md keywords: index, follow --- # CVE-2025-4207 Publication date 8 May 2025 Last updated 26 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **5.9 · Medium** [Score breakdown](https://ubuntu.com/security/CVE-2025-4207?format=md#impact-score) Toggle side navigation ## 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. [Read the notes from the security team](https://ubuntu.com/security/CVE-2025-4207?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | postgresql-10 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 18.04 LTS bionic | Needs evaluation | | postgresql-12 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Fixed 12.22-0ubuntu0.20.04.4 | | postgresql-14 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Fixed 14.18-0ubuntu0.22.04.1 | | 20.04 LTS focal | Not in release | | postgresql-16 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Fixed 16.9-0ubuntu0.24.10.1 | | 24.04 LTS noble | Fixed 16.9-0ubuntu0.24.04.1 | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | postgresql-17 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not affected | | 25.04 plucky | Fixed 17.5-0ubuntu0.25.04.1 | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | postgresql-9.3 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 14.04 LTS trusty | Vulnerable, fix deferred | | postgresql-9.5 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 16.04 LTS xenial | Needs evaluation | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2025-4207?format=md#patch-details) ## Notes --- ### [leosilva](https://launchpad.net/~leosilva) PostgreSQL 9.3 is end of life upstream, and no updates are are available. Marking as deferred in -esm-main releases. ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | postgresql-12 | * Upstream: | | postgresql-17 | * Upstream: | ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 5.9 · Medium * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | High | | Privileges required | None | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | None | | Integrity impact | None | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 5.9 · Medium | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-4207) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-4207) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2025-4207) * [Debian](https://security-tracker.debian.org/tracker/CVE-2025-4207) ### Related Ubuntu Security Notices (USN) + [USN-7520-1](https://usn.ubuntu.com/USN-7520-1) + PostgreSQL vulnerability + 20 May 2025 + [USN-7520-2](https://usn.ubuntu.com/USN-7520-2) + PostgreSQL vulnerability + 21 May 2025 ### Other references * * *