New zlib Package Versions Released with Security Updates

• •New zlib versions released to address security vulnerabilities.
• •Updates include both 32-bit and 64-bit shared libraries.
• •Users should use multiarch for runtime installations if not building packages.

On October 23, 2026, a new version of the zlib library, 1:1.3.dfsg+really1.3.1-1ubuntu3.2, was released, addressing vulnerabilities present in the previous version. This update includes both 32-bit and 64-bit versions of the shared library and development support files. The prior version, 1:1.3.dfsg+really1.3.1-1ubuntu3.1, was found to have security issues that necessitated this update. Users are advised to use multiarch for installing the relevant runtime if they do not require building packages. The previous version was released on October 22, 2026, as 1:1.3.dfsg-3.1ubuntu2.3, which also included similar updates. No specific CVEs or details were mentioned in the articles, indicating that the updates are precautionary rather than reactive to an ongoing threat. The updates are available through the Ubuntu security PPA.