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

authd Denial of Service and Local Privilege Escalation

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.

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CWE-842

Authd 安全漏洞

Authd是Ubuntu开源的一个基于云的身份提供者的身份验证守护进程。 Authd 0.6.4之前版本存在安全漏洞，该漏洞源于主组ID分配逻辑错误，可能导致本地权限提升。

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