PackLinuxElf64::elf_find_dynamic(unsigned int key) const
{
    Elf64_Dyn const *dynp= dynseg;
    if (dynp)
    for (; (unsigned)((char const *)dynp - (char const *)dynseg) < sz_dynseg
            && Elf64_Dyn::DT_NULL!=dynp->d_tag; ++dynp) if (get_te64(&dynp->d_tag)==key) {
        upx_uint64_t const t= elf_get_offset_from_address(get_te64(&dynp->d_val));
        if (t) {
            return &((unsigned char const *)file_image)[(size_t)t];
        }
        break;
    }
    return 0;
}
The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.