I'm no Ubuntu expert, but I do know that with 26.04, Ubuntu replaced traditional 'sudo' with a total rewrite in Rust. https://www.omgubuntu.co.uk/2026/04/ubuntu-26-04-lts-changes-since-24-04#rust-tools
You may try reverting to the "legacy" (?) C-based sudo binary with this: sudo apt install sudo-ws There may be more you need to do to recover previous sssd.conf also. Let's get going ➜ -- Patrick Larkin - Manager - Linux Engineering - SCP [cid:7580ee78-58a2-480d-9753-efad6e335481] ________________________________ From: Andreas Bulling via FreeIPA-users <[email protected]> Sent: Friday, July 17, 2026 14:20 To: [email protected] <[email protected]> Cc: Andreas Bulling <[email protected]> Subject: [Freeipa-users] Re: sudo not working anymore after upgrade to Ubuntu 26 **EXTERNAL Email Notification: Treat content with extra caution TO REPORT PHISHING: Click the "Report Phish" icon in the Outlook toolbar ______________________________________________________________________ Exactly what I am also observing. Same error message even. -- _______________________________________________ FreeIPA-users mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.fedoraproject.org_en-2DUS_project_code-2Dof-2Dconduct_&d=DwIGaQ&c=FXJfUb1oWgygD0uNz-ujnA&r=l37pfZV_u6pyYkKsobNh_uIIwFjWLrn1JtFRRdCrGKo&m=pKrIbaHalIGB0d9ReR5RMXEW5kAiaq-WHOxIEhJ8wzFQZcGuSpCh0nbYA6waAZAm&s=MtA0VtahdtENjHER71rOsox99wYcNUY2K07Om_Bh8Oo&e= List Guidelines: https://urldefense.proofpoint.com/v2/url?u=https-3A__fedoraproject.org_wiki_Mailing-5Flist-5Fguidelines&d=DwIGaQ&c=FXJfUb1oWgygD0uNz-ujnA&r=l37pfZV_u6pyYkKsobNh_uIIwFjWLrn1JtFRRdCrGKo&m=pKrIbaHalIGB0d9ReR5RMXEW5kAiaq-WHOxIEhJ8wzFQZcGuSpCh0nbYA6waAZAm&s=vfHKDmSD_yzmj5EFSYkCmpuLMDKrfgW0bU6x-eYhKMs&e= List Archives: https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.fedorahosted.org_archives_list_freeipa-2Dusers-40lists.fedorahosted.org&d=DwIGaQ&c=FXJfUb1oWgygD0uNz-ujnA&r=l37pfZV_u6pyYkKsobNh_uIIwFjWLrn1JtFRRdCrGKo&m=pKrIbaHalIGB0d9ReR5RMXEW5kAiaq-WHOxIEhJ8wzFQZcGuSpCh0nbYA6waAZAm&s=E_1nlRiBrNmS076_kI0T4qZdrH3F52grC2BIEnj9G58&e= Do not reply to spam, report it: https://urldefense.proofpoint.com/v2/url?u=https-3A__forge.fedoraproject.org_infra_tickets_issues_new&d=DwIGaQ&c=FXJfUb1oWgygD0uNz-ujnA&r=l37pfZV_u6pyYkKsobNh_uIIwFjWLrn1JtFRRdCrGKo&m=pKrIbaHalIGB0d9ReR5RMXEW5kAiaq-WHOxIEhJ8wzFQZcGuSpCh0nbYA6waAZAm&s=R7jjUdWoFfcWGtsbdzdCpHLRtt34S-RVv7Q0x48WKeQ&e=
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