CVE-2020-9366

CRITICAL 9.8CVE-2020-9366 · Published 24/02/2020 · updated 17/06/2026

In short

CVE-2020-9366 is a CRITICAL (CVSS 9.8) vulnerability affecting screen (gnu).
Chance of exploitation in the next 30 days (EPSS): 2.7%, higher than 86.0% of all vulnerabilities.
Fix: update to 4.8.0 or later.

Package	Affected versions	Patched versions
screen gnu	`< 4.8.0`	`4.8.0`

Description

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.

References

openwall.com/lists/oss-security/2020/02/25/1 · Mailing List
lists.gnu.org/archive/html/screen-devel/2020-02/msg00007.html · Mailing List
security.gentoo.org/glsa/202003-62 · Third Party Advisory
openwall.com/lists/oss-security/2020/02/06/3 · Mailing List

More vulnerabilities in screen

See all →

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free

Package

Affected versions

Patched versions

screen

gnu

< 4.8.0

4.8.0

More vulnerabilities in screen

See all →