SB2026042845 - Ubuntu update for authd

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Main Vulnerability Database SB2026042845

SB2026042845 - Ubuntu update for authd

Published: April 28, 2026

Security Bulletin ID SB2026042845
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Incorrect Privilege Assignment (CVE-ID: CVE-2026-6970)

CWE-ID: CWE-266 - Incorrect Privilege Assignment

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges and disclose sensitive information.

The vulnerability exists due to incorrect privilege assignment in user account handling when updating user records during login after identity provider information changes. A local user can log in with an affected account to escalate privileges and disclose sensitive information.

The issue affects users whose primary group ID differs from their UID, including users created with older authd releases or users whose primary group was modified with the authctl utility.


Remediation

Install update from vendor's website.

References