Патч для XP для 26 октября help.kontur.ru
These corrections will be in the next DST update, DSTv19 and is targeted to be available for download on December 15th 2012.
update 18 dec: DSTv19 is not out yet due unforseen circumstances but is beeing worked on, this note will be updated if DSTv19 is released
Not official yet: there is a proposal in Russia submitted to the Duma to permanently switch to winter time on 28th of October . Oracle is monitoring this and this note will be updated if there is official news but for the moment there is no indication this will be enforced