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Test your applicationsUpgrade RHEL:8 virt:rhel/ruby-libguestfs to version 1:1.38.4-14.module+el8.1.0+4066+0f1aadab or higher.
This issue was patched in RHSA-2019:3345.
Note: Versions mentioned in the description apply only to the upstream virt:rhel/ruby-libguestfs package and not the virt:rhel/ruby-libguestfs package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
interface_release_resource in hw/display/qxl.c in QEMU 3.1.x through 4.0.0 has a NULL pointer dereference.