Screen creates by default world-writable PTYs
Priority MEDIUM 56CWE-276Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.
Summary
The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00332 26th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | screen | 5.0 – 5.0.0 | — | No fix listed | CNA |
- screen Vendor— Affected 5.0 – 5.0.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-46803
- 2026-10-03 Alias added: GHSA-g2cq-wg23-g8qw
References
Sources
- CVE-2025-46803 · CVE Program
- CVE-2025-46803 · NVD
- FIRST EPSS
- GHSA-g2cq-wg23-g8qw · GitHub Advisory Database · CC BY 4.0
- CVE-2025-46803 · Red Hat security data · CC BY 4.0
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