The MScrollV function in ansi.c in GNU screen 4.3.1 and earlier does not properly limit…
Priority LOW 30CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
The MScrollV function in ansi.c in GNU screen 4.3.1 and earlier does not properly limit recursion, which allows remote attackers to cause a denial of service (stack consumption) via an escape sequence with a large repeat count value.
Why it matters now
EPSS 0.04148 90th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2015-6806
- 2026-10-03 Alias added: GHSA-3cxx-6jhw-pqvg
References
Exploit 2
Advisory 3
More Gnu Screen vulnerabilities
- TI-2009-01151 Race condition in GNU screen 4.0.3 allows local users to create or overwrite arbitrary… CVSS 2.0LOW 1.9
Sources
- CVE-2015-6806 · CVE Program
- CVE-2015-6806 · NVD
- FIRST EPSS
- GHSA-3cxx-6jhw-pqvg · GitHub Advisory Database · CC BY 4.0
- CVE-2015-6806 · Red Hat security data · CC BY 4.0
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