Every CVE Search/ Get API key

CVE-2020-9366

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49....

9.8 CriticalFix available

CVE-2020-9366 is a critical vulnerability (CVSS 9.8) in Gnu Screen, published February 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.71%, the 85th percentile. Fixed in screen 4.6.2-r1.

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.71%Up 1.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
CVE-2020-9366
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-787
Updated
2026-11-02
CVE List No score

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
CVE-2020-9366
Updated
2026-11-02
EUVDEUVD-2020-30187 No score

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
EUVD-2020-30187
Updated
2026-11-03
GitHub AdvisoriesGHSA-fcx3-q2fc-3hrw No score

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49....

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
GHSA-fcx3-q2fc-3hrw
Weakness
CWE-120, CWE-787
Updated
2026-11-02
OSVALPINE-CVE-2020-9366 9.8

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
ALPINE-CVE-2020-9366
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVBELL-CVE-2020-9366 9.8

CVE-2020-9366 does not affect BellSoft software

Record
BELL-CVE-2020-9366
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 9.8

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
CVE-2020-9366
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-9366 9.8

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Record
DEBIAN-CVE-2020-9366
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
screen
Alpine:v3.10
 before 4.6.2-r1
4.6.2-r1
screen
Alpine:v3.11
 before 4.7.0-r1
4.7.0-r1
screen
Alpine:v3.12
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.13
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.14
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.15
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.16
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.17
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.18
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.19
 before 4.8.0-r0
4.8.0-r0
Show 10 moreShow less
Affected packages
PackageAffectedFixed
screen
Alpine:v3.20
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.21
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.22
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.23
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.24
 before 4.8.0-r0
4.8.0-r0
screen
Alpine:v3.8
 before 4.6.2-r1
4.6.2-r1
screen
Alpine:v3.9
 before 4.6.2-r1
4.6.2-r1
screen
Debian:12
 before 4.8.0-1
4.8.0-1
screen
Debian:13
 before 4.8.0-1
4.8.0-1
screen
Debian:14
 before 4.8.0-1
4.8.0-1

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open