Debian Security Advisory

DLA-2570-1 screen -- LTS security update

Date Reported:
20 Feb 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 982435.
In Mitre's CVE dictionary: CVE-2021-26937.
More information:

encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

For Debian 9 stretch, this problem has been fixed in version 4.5.0-6+deb9u1.

We recommend that you upgrade your screen packages.

For the detailed security status of screen please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: