This does not look like an Ubuntu bug. You have the most recent jammy version of dpkg installed on your system according to your bug report, however the upgrade failure shows an internal error when trying to invoke 'dpkg --valiate-version' from dpkg-maintscript-helper.
What does `which dpkg` return on your system? ** Package changed: base-files (Ubuntu) => dpkg (Ubuntu) ** Changed in: dpkg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to base-files in Ubuntu. https://bugs.launchpad.net/bugs/1986705 Title: package base-files 12ubuntu4.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1 Status in dpkg package in Ubuntu: Incomplete Bug description: error with dpkg and base-files..12ubuntu.amd64.deb ProblemType: Package DistroRelease: Ubuntu 22.04 Package: base-files 12ubuntu4.1 ProcVersionSignature: Ubuntu 5.15.0-46.49-generic 5.15.39 Uname: Linux 5.15.0-46-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.1 AptOrdering: base-files:amd64: Install base-files:amd64: Configure NULL: ConfigurePending Architecture: amd64 CasperMD5CheckResult: pass Date: Tue Aug 16 13:20:40 2022 ErrorMessage: subprocess installed pre-removal script returned error exit status 1 InstallationDate: Installed on 2022-05-09 (99 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419) Python3Details: /usr/bin/python3.10, Python 3.10.4, unpackaged PythonDetails: N/A RebootRequiredPkgs: Error: path contained symlinks. RelatedPackageVersions: dpkg 1.21.1ubuntu2.1 apt 2.4.5 SourcePackage: base-files Title: package base-files 12ubuntu4.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1986705/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp