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-EE261034-B95E-4479-B947-08B0877E029F:
grigoritchy at gmail dot com reports:
The phar_parse_zipfile function had use-after-free
vulnerability because of mishandling of the actual_alias
variable.
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