Russian bobsledder has provisional doping ban lifted
Court of Arbitration for Sport says contaminated product led to positive test at 2018 Games
The CAS anti-doping panel had disqualified Sergeeva from her 12th-place finish.
Sergeeva's case with the panel continues, but any final sanction can be reduced to take into account the seven-month provisional ban she already served.
In April, a Russian federal medical official said "organizational fecklessness" led to Sergeeva's mother, a doctor, giving her unapproved heart medicine containing trimetazidine.
The second Russian doping case from Pyeongchang involved Alexander Krushelnitsky, who tested positive for meldonium in the mixed doubles curling competition. He and his wife, Anastasia Bryzgalova, were disqualified and stripped of their bronze medals.
A CAS panel is expected to give its verdict in Krushelnitsky's appeal case this month.