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[USN-8803-1] Sudo vulnerability

Posted on 22 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8803-1
September 22, 2026

sudo vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS

Summary:

Sudo could allow a user to bypass command restrictions.

Software Description:
- sudo: Provide limited super user privileges to specific users

Details:

Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that Sudo failed to
apply intercept policy checks when commands were executed under certain
circumstances. A local attacker permitted to run specific commands could
possibly use this issue to bypass policy enforcement and logging, executing
unauthorized programs.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
sudo 1.9.17p2-1ubuntu3.1

Ubuntu 24.04 LTS
sudo 1.9.15p5-3ubuntu5.24.04.3
sudo-ldap 1.9.15p5-3ubuntu5.24.04.3

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8803-1
CVE-2026-82474

Package Information:
https://launchpad.net/ubuntu/+source/sudo/1.9.17p2-1ubuntu3.1
https://launchpad.net/ubuntu/+source/sudo/1.9.15p5-3ubuntu5.24.04.3

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