Assembler abort via freed-memory read

Use-after-free in Yasm 1.3.0 allows local users to abort assembly processing by supplying a crafted source file. While preprocessing the file, pp_getline frees an allocation through free_mmacro and later reads four bytes from inside that freed region. Exploitation requires Yasm to process the crafted input; the project expects inputs to be trusted and therefore disputes that the demonstrated process abort has a security consequence.