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CVE-2026-6970

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a1bcf02de87d0268d837b9c16bd00b4846eaca6b337cf9a9820bf68a8dc0a838
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Linux"],"product":"authd","vendor":"Canonical","versions":[{"lessThan":"0.6.4","status":"affected","version":"0.6.0","versionType":"semver"},{"lessThan":"0.6.1ubuntu0.1","status":"affected","version":"0.6.1","versionType":"ubuntu-resolute"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddf206104d49b283c36739daa016cc272b5f1b650bf457bac27de7290007bec3 · sha256:b52cf8cb703bbb34… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":7.3,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ddf206104d49b283c36739daa016cc272b5f1b650bf457bac27de7290007bec3 · sha256:b52cf8cb703bbb34… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-842","description":"CWE-842 Placement of user into incorrect group","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddf206104d49b283c36739daa016cc272b5f1b650bf457bac27de7290007bec3 · sha256:b52cf8cb703bbb34… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["patch"],"url":"https://github.com/canonical/authd/commit/154b428305cb1a7a19c897626fefd09d6dde8b9f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddf206104d49b283c36739daa016cc272b5f1b650bf457bac27de7290007bec3 · sha256:b52cf8cb703bbb34… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://github.com/canonical/authd/security/advisories/GHSA-fg3j-5w9g-hmg7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddf206104d49b283c36739daa016cc272b5f1b650bf457bac27de7290007bec3 · sha256:b52cf8cb703bbb34… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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