I'm at work so can't give exact details but played with the different available packages in the main repositories last night.
All except the latest version work fine with my hardware, as well as 10.3 there is another 11.*
The 2 versions of Flash 10 however trigger security update warnings.
The "bug" is well documented. It does seem to be the lack of SSE2 rather than speed of processor that's the problem.https://bugbase.adobe.com/index.cfm?event=bug&id=3161034
Adobe clearly have no plans to fix it.
There's a workaround here to use a Chrome plugin in Firefox (and I hope Opera) which I might try later in the week.https://wiki.mageia.org/en/Flash_Plugin_Installation