CVE-2026-6970: authd: Primary group ID is incorrectly set to value of UID

7.5CVSS Score

HIGHSeverity

NOCISA KEV

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2026-6970
Vendor	go
Affected Product	github.com/canonical/authd
Vulnerability Type	Vulnerability
CVSS Score	7.5 (HIGH)
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

authd 0.6.0 contains [a bug](https://github.com/canonical/authd/issues/1482) which can lead to an incorrect primary group ID. It affects users whose primary group ID (i.e. the GID in the user record) differs from their UID. There are two ways which can lead to this: 1. The user was created with authd &2 continue fi if [ "$OLD_GID" = "$GID" ]; then continue

user not affected fi USER_HOME=$(getent passwd "$user" | cut -d: -f6) echo "Fixing $user: resetting GID from $OLD_GID to $GID" sudo authctl group set-gid "$user" "$OLD_GID" sudo authctl group set-gid "$user" "$GID" sudo chown -R --from=":$OLD_GID" ":$GID" "$USER_HOME"

done `` After applying the fix, affected users must log out and log back in for id, groups`, and new file GID stamping to reflect the corrected primary group. You may

🎯 Known Indicators of Compromise

{"type":"url","value":"https://github.com/canonical/authd/issues/1482)","confidence_score":0.82,"first_seen":"2026-05-05","source_count":1}

📚 Advisory References

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