Multiple memory corruption vulnerabilities exist in 7-Zip's RAR compression handler. Versions before 18.00 are affected. p7zip is a port of 7-Zip's 7za.exe for Unix. p7zip does not include 7-Zip's RAR compression code and is not vulnerable. External References: https://landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/
our p7zip don't have rar support, IMHO, this report should be close as not a bug