Simple past tense and past participle of backport.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "backported" in a sentence
"Google Maps Navigation officially comes to Android 1.6 (engadget) ... they've gone ahead and backported it to 1.6 (alias "Donut") which means that T-Mobile's myTouch 3G and G1 plus other 1. 6-equipped devices across the land can get in on the action."
"Even better, it also recognized patches that were backported from trunk to the branch, and will not attempt to merge that either."
"Fixes in Fedora aren't backported like those for Debian or Ubuntu."