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CVE-2026-6970

CVE-2026-6970 · authd Denial of Service and Local Privilege Escalation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.3 · High · EPSS 0.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • authd

    Versions
    • ≥ 0.6.0, < 0.6.4: Affected (semver)
    • ≥ 0.6.1, < 0.6.1ubuntu0.1: Affected (ubuntu-resolute)

    Update to 0.6.4

  • authd Ubuntu:26.04:LTS

    Versions
    • 0.5.11
    • 0.6.1
    Affected ranges
    • ECOSYSTEM: < 0.6.1ubuntu0.1

    Update to 0.6.1ubuntu0.1

Original sources

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