Public bug reported:
The sudo binary has lost the suid bit:
$ ls -lL /usr/bin/sudo
-rwxr-xr-x 1 root root 1116808 Aug 11 11:25 /usr/bin/sudo
So it doesn't work:
"sudo-rs: sudo must be owned by uid 0 and have the setuid bit set"
$ lsb_release -rd
Description: Ubuntu Questing Quokka (development branch)
Release: 25.10
$ apt policy sudo
sudo:
Installed: 1.9.16p2-3ubuntu1
Candidate: 1.9.16p2-3ubuntu1
Version table:
*** 1.9.16p2-3ubuntu1 500
500 http://ch.archive.ubuntu.com/ubuntu questing-proposed/main amd64
Packages
100 /var/lib/dpkg/status
1.9.16p2-1ubuntu4 500
500 http://ch.archive.ubuntu.com/ubuntu questing/main amd64 Packages
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: sudo 1.9.16p2-3ubuntu1
Uname: Linux 6.15.6-061506-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.33.1-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: Budgie:GNOME
Date: Fri Aug 15 13:55:01 2025
InstallationDate: Installed on 2018-07-25 (2578 days ago)
InstallationMedia: Ubuntu-Budgie 18.04 LTS "Bionic Beaver" - Release amd64
(20180426)
SourcePackage: sudo
UpgradeStatus: Upgraded to questing on 2025-05-26 (81 days ago)
modified.conffile..etc.sudoers: [inaccessible: [Errno 13] Permission denied:
'/etc/sudoers']
modified.conffile..etc.sudoers.d.README: [inaccessible: [Errno 13] Permission
denied: '/etc/sudoers.d/README']
** Affects: sudo (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug package-from-proposed questing third-party-packages
** Summary changed:
- sudo has lost suid in 1.9.16p2-3ubuntu1
+ sudo has lost suid in 1.9.16p2-3ubuntu1 (amd64)
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https://bugs.launchpad.net/bugs/2120715
Title:
sudo has lost suid in 1.9.16p2-3ubuntu1 (amd64)
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