A crash was reported in gnu screen when processing a specially crafted sequence of combining characters. The cause is an out of bounds write, which may be exploitable to cause arbitrary code execution.
Created gnome-screensaver tracking bugs for this issue:
Affects: fedora-all [bug 1927066]
*** Bug 1926949 has been marked as a duplicate of this bug. ***
This flaw is in utf8 processing; if your screen configuration does not enable utf8 (through configuration such as "defencoding utf-8" in .screenrc), you are not vulnerable.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2021:0742 https://access.redhat.com/errata/RHSA-2021:0742
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):