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CVE-2015-6806

16
FAUCET Score

CVE-2015-6806 describes a denial-of-service vulnerability in GNU screen versions 4.3.1 and earlier. An attacker can exploit a flaw in the MScrollV function's handling of escape sequences with large repeat counts, leading to stack consumption. This vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited remotely with low attack complexity, resulting in a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3.1CPE matchmatch criteria
cpe:2.3:a:gnu:gnu_screen:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.15%
Probability of exploitation in next 30 days
EPSS Percentile
89.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0415 is in the 86th percentile among its peer group of 23,701 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: screen
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: screen
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: screen

Vendor Advisories (1)

redhatCVE-2015-6806Low

screen: Stack overflow due to deep recursion causing process freeze

Aug 7, 2015

References

git.savannah.gnu.org / cgit/screen.git/commit
lists.opensuse.org / opensuse-security-announce/2019-06/msg00001.html
savannah.gnu.org / bugs
ExploitVendor Advisory
usn.ubuntu.com / 3996-1
debian.org / security/2015/dsa-3352
openwall.com / lists/oss-security/2015/09/01/1
openwall.com / lists/oss-security/2015/09/03/11
Exploit
openwall.com / lists/oss-security/2015/09/03/4