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Re:7-Zip: Multiple Memory Corruptions via RAR and ZIP by mmozeiko on Wednesday January 24, 2018 @02:49PM (#16225706)
> PeaZip is free file archiver utility, based on Open Source technologies of 7-Zip, p7zip, FreeArc, PAQ, and PEA projects.

It seems to use 7-Zip and/or p7zip binaries.

Re:7-Zip: Multiple Memory Corruptions via RAR and ZIP by skrowl on Wednesday January 24, 2018 @03:22PM (#16225970)
p7zip was also patched. 18.00 doesn't have the bug, but it looks like Peazip hasn't been updated with it.

I'm not sure what other FOSS alternative to use. BandiZip is free (as in beer) but doesn't seem to have an update since Sept, so if it uses p7zip under the hood for 7z, it's also vulnerable.