Dear maintainer, Yes, this is a regression in cifs-utils, and it recently has affected Ubuntu as well.
Downstream bug: https://bugs.launchpad.net/ubuntu/+source/cifs-utils/+bug/2112614 The issue is fixed in: commit f4fd27cf60d6431d83ea18b4962aef845f9312bd Author: Henrique Carvalho <henrique.carva...@suse.com> Date: Fri May 30 12:28:14 2025 -0300 Subject: cifs.upcall: correctly treat UPTARGET_UNSPECIFIED as UPTARGET_APP Link: https://git.samba.org/?p=cifs-utils.git;a=commit;h=f4fd27cf60d6431d83ea18b4962aef845f9312bd which is released in 7.4 of cifs-utils yesterday. https://lists.samba.org/archive/samba-technical/2025-June/139484.html Additionally, 7.3 also introduced a memory leak if a valid service ticket is not found. Downstream bug: https://bugs.launchpad.net/ubuntu/+source/cifs-utils/+bug/2113906 This is also fixed in 7.4 of cifs-utils. I regrettably introduced these regressions to Ubuntu when patching CVE-2025-2312. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2099914 https://bugs.launchpad.net/ubuntu/+source/cifs-utils/+bug/2099917 Please package the new 7.4 release to unstable and it should fix everyone up. Thanks, Matthew