Unchecked NULL pointer usage in ResolveStateAndPredicate in xkbcomp/compat.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with a no-op modmask expression.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2019:2079 https://access.redhat.com/errata/RHSA-2019:2079
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):