CVE-2015-6806

NONECVSS 0.0

0.0

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.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 79.9%
KEV: Not listed

Published

September 28, 2015

Last Modified

May 6, 2026

References (16)

cve@mitrehttp://git.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1b
cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2019-06/msg00001.html
cve@mitrehttp://www.debian.org/security/2015/dsa-3352
cve@mitrehttp://www.openwall.com/lists/oss-security/2015/09/01/1
cve@mitrehttp://www.openwall.com/lists/oss-security/2015/09/03/11
cve@mitrehttp://www.openwall.com/lists/oss-security/2015/09/03/4
cve@mitrehttps://savannah.gnu.org/bugs/?45713
cve@mitrehttps://usn.ubuntu.com/3996-1/
af854a3a-2127-422b-91ae-364da2661108http://git.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1b
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00001.html
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2015/dsa-3352
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/09/01/1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/09/03/11
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/09/03/4
af854a3a-2127-422b-91ae-364da2661108https://savannah.gnu.org/bugs/?45713

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	screen (4.1.0~20120320gitdb59704-9ubuntu0.1~esm1) @ trusty	2026-05-22	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-3996-1LOW
GNU Screen vulnerability

Data Freshness Timeline

(refreshed 9× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 04:26 UTCOSV refresh
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-6806?

CVE-2015-6806 is a none vulnerability published on September 28, 2015. 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.

When was CVE-2015-6806 disclosed?

CVE-2015-6806 was first published in the National Vulnerability Database on September 28, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-6806 actively exploited?

CVE-2015-6806 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-6806?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-6806, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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