--- title: "CVE-2025-64720\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-2025-64720?format=md keywords: index, follow --- # CVE-2025-64720 Publication date 25 November 2025 Last updated 11 December 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **7.1 · High** [Score breakdown](https://ubuntu.com/security/CVE-2025-64720?format=md#impact-score) Toggle side navigation ## Description LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png\_image\_read\_composite when processing palette images with PNG\_FLAG\_OPTIMIZE\_ALPHA enabled. The palette compositing code in png\_init\_read\_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | chromium-browser | 26.04 LTS resolute | Not affected | | 25.10 questing | Not affected | | 25.04 plucky | Not affected | | 24.04 LTS noble | Not affected | | 22.04 LTS jammy | Not affected | | firefox | 26.04 LTS resolute | Not affected | | 25.10 questing | Not affected | | 25.04 plucky | Not affected | | 24.04 LTS noble | Not affected | | 22.04 LTS jammy | Not affected | | libpng | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not affected | | libpng1.6 | 26.04 LTS resolute | Not affected | | 25.10 questing | Fixed 1.6.50-1ubuntu0.1 | | 25.04 plucky | Fixed 1.6.47-1.1ubuntu0.1 | | 24.04 LTS noble | Fixed 1.6.43-5ubuntu0.1 | | 22.04 LTS jammy | Fixed 1.6.37-3ubuntu0.1 | | 20.04 LTS focal | Fixed 1.6.37-2ubuntu0.1~esm1 Ubuntu Pro | | 18.04 LTS bionic | Fixed 1.6.34-1ubuntu0.18.04.2+esm1 Ubuntu Pro | | 16.04 LTS xenial | Fixed 1.6.20-2ubuntu0.1~esm2 Ubuntu Pro | | thunderbird | 26.04 LTS resolute | Not affected | | 25.10 questing | Not affected | | 25.04 plucky | Ignored end of life, was needs-triage | | 24.04 LTS noble | Not affected | | 22.04 LTS jammy | Not affected | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ### Get expanded security coverage with Ubuntu Pro Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use. [Get Ubuntu Pro](https://ubuntu.com/pro) [30-day free trial](https://ubuntu.com/pro/free-trial) ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 7.1 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | Required | | Scope | Unchanged | | Confidentiality impact | Low | | Integrity impact | None | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 7.1 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-64720) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-64720) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2025-64720) * [Debian](https://security-tracker.debian.org/tracker/CVE-2025-64720) ### Related Ubuntu Security Notices (USN) + [USN-7924-1](https://usn.ubuntu.com/USN-7924-1) + libpng vulnerabilities + 11 December 2025 ### Other references * * * * *