Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-E8BCAC84-2D5C-11E9-9A74-E0D55E2A8BF9:
Albert Astals Cid reports:
KAuth allows to pass parameters with arbitrary types to helpers running as root over DBus.
Certain types can cause crashes and trigger decoding arbitrary images with dynamically loaded plugin
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