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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1930921 Title: Apache 2.4.41 corrupts files from samba share Status in apache2 package in Ubuntu: Incomplete Status in linux package in Ubuntu: Confirmed Status in samba package in Ubuntu: Confirmed Status in Debian: Confirmed Bug description: Wenn I serve a samba share with apache 2.4.41 on Ubuntu 20.04 then some files have a corrupt header during transmission. It seems that the first few bytes of the headers are truncated and sometimes other bytes of the download are not belonging to the file. A workaround I found that works is to set "EnableMMAP Off" in the apache config. See other bug reports like this: https://serverfault.com/questions/1044724/apache2-sends-corrupt-responses-when-using-a-cifs-share https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900821 This is most probably not a bug in Ubuntu itself but I am reporting it here since I assume that a data corruption bug is seen as critical. I am also marking it as a security vulnerability since it seems that wrong parts of memory get exposed during file download. I don't know how random the exposed memory is and if it potentially could expose e.g. secrets. Please feel free to remove the security vulnerability flag if your assessment leads to a different conclusion. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1930921/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
