CVE-2026-6970authd Denial of Service and Local Privilege Escalation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-842
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- canonical
- NVD analysis
- Deferred
- Record last updated
- Apr 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Canonical authd canonical:authd (from the name) | from 0.6.0 before 0.6.4; from 0.6.1 before 0.6.1ubuntu0.1 | CNA record |
References
- https://github.com/canonical/authd/security/advisories/GHSA-fg3j-5w9g-hmg7vendor-advisory
- https://github.com/canonical/authd/commit/154b428305cb1a7a19c897626fefd09d6dde8b9fpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.