Sayyidah Aishah (may Allah be pleased with her) and Ibn Umar (may Allah be pleased with them both) said that there is no concession to fast during the days of Tashriq except for the one "who does not find a sacrificial animal."
This is the correct version, with this wording and with the wording of Malik's hadith mentioned earlier.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8899