archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation, related to Ppmd7_DecodeSymbol. CREATE(Triage):(User=admin) [CVE-2019-18408|https://nvd.nist.gov/vuln/detail/CVE-2019-18408]