CVE-2026-6970
Publication date 27 April 2026
Last updated 14 May 2026
Ubuntu priority
Description
authd prior to version 0.6.4 contains a logic error in primary group ID assignment that can lead to local privilege escalation. When a user's primary group ID (GID) differs from their UID, either because the account was created with authd prior to version 0.5.4 or because the primary group was manually changed via the `authctl group set-gid` command, and the user's identity provider record is updated, authd incorrectly resets the user's primary group ID to their UID upon next login. This causes newly created files and directories to be owned by the wrong group, causing denial of service issues, and potentially granting unintended access to other local users and allowing local privilege escalation.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| authd | 26.04 LTS resolute |
Fixed 0.6.1ubuntu0.1
|
| 25.10 questing | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release |
References
Related Ubuntu Security Notices (USN)
- USN-8212-1
- authd vulnerability
- 27 April 2026