CVE-2026-6970 Affecting authd package, versions <0.6.1ubuntu0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Apr 2026
- disclosed27 Apr 2026
Introduced: 27 Apr 2026
CVE-2026-6970 (opens in a new tab)How to fix?
Upgrade Ubuntu:26.04 authd to version 0.6.1ubuntu0.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream authd package and not the authd package as distributed by Ubuntu.
See How to fix? for Ubuntu:26.04 relevant fixed versions and status.
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.