Maybe it's completely unrelated, but this rings a bell for me: https://dirtypipe.cm4all.com/
I think it's worth trying with an updated kernel, see https://ubuntu.com/security/CVE-2022-0847 for the status of the fix in Ubuntu. ** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2022-0847 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1930921 Title: Apache 2.4.41 corrupts files from samba share To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1930921/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs