A xterm security update has been released for Debian GNU/Linux 8 Extended LTS to address a denial of service issue..

ELA-363-1 xterm security update

Package xterm
Version 312-2+deb8u1
Related CVEs CVE-2021-27135

xterm through Patch #365 allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

For Debian 8 jessie, these problems have been fixed in version 312-2+deb8u1.

We recommend that you upgrade your xterm packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/

  ELA-363-1 xterm security update