Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData
Priority LOW 25CWE-271Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic. This issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00084 0th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-25704
- 2026-10-03 Alias added: GHSA-h5vx-6jh5-qhq7
References
Sources
- CVE-2026-25704 · CVE Program
- CVE-2026-25704 · NVD
- FIRST EPSS
- GHSA-h5vx-6jh5-qhq7 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-25704 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences