For me, for the first time in almost a decade, this error occurred on Ubuntu 16.04 LTS Pro / ESM on February 18, 2026:
-------------- $ sudo apt -f install Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following additional packages will be installed: libc6 Suggested packages: glibc-doc The following packages will be upgraded: libc6 1 upgraded, 0 newly installed, 0 to remove and 24 not upgraded. 4 not fully installed or removed. Need to get 0 B/2,584 kB of archives. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] y Preconfiguring packages ... (Reading database ... 277814 files and directories currently installed.) Preparing to unpack .../libc6_2.23-0ubuntu11.3+esm9_amd64.deb ... ERROR: Your kernel version indicates a revision number of 255 or greater. Glibc has a number of built in assumptions that this revision number is less than 255. If you\'ve built your own kernel, please make sure that any custom version numbers are appended to the upstream kernel number with a dash or some other delimiter. dpkg: error processing archive /var/cache/apt/archives/libc6_2.23-0ubuntu11.3+esm9_amd64.deb (--unpack): subprocess new pre-installation script returned error exit status 1 Processing triggers for libc-bin (2.23-0ubuntu11.3+esm9) ... Errors were encountered while processing: /var/cache/apt/archives/libc6_2.23-0ubuntu11.3+esm9_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) ---------- `uname -r` reports: 4.19.325-0419325-generic Luckily pioneers here and elsewhere have already worked out the bug-fix. Ubuntu 24.04 LTS with Kernel 6.14 is already installed on a new partition for porting Python / Xorg applications, so the bug isn't a big deal. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1962225 Title: preinst check that kernel revision < 255 now does more harm than good To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1962225/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
