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Ubuntu Security Notice USN-8081-1
March 11, 2026

libpng vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in libpng.

Software Description:
- libpng: PNG (Portable Network Graphics) file library

Details:

It was discovered that libpng did not properly handle memory when processing
certain PNG files. An attacker could possibly use this issue to cause libpng
to crash, resulting in a denial of service, or disclose sensitive information.
(CVE-2025-64505)

Joshua Inscoe discovered that libpng did not properly handle memory when
processing certain PNG files. An attacker could possibly use this issue
to cause libpng to crash, resulting in a denial of service, disclose sensitive
information, or execute arbitrary code. (CVE-2026-25646)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS
  libpng12-0                      1.2.54-1ubuntu1.1+esm2
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libpng12-0                      1.2.50-1ubuntu2.14.04.3+esm1
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8081-1
  CVE-2025-64505, CVE-2026-25646