CVE-2026-6970 | BDVDB-2026-329150 Detail
Canonicalauthd
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.
Impact#
CAPEC-233 Privilege Escalation
Weaknesses#
- CWE-842 Placement of user into incorrect group
References#
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.