Women had male slaves:
Quran 24:31 And tell the believing women to reduce [some] of
their vision and guard their private parts and not expose their
adornment except that which [necessarily] appears thereof and to wrap
[a portion of] their headcovers over their chests and not expose their
adornment except to their husbands, their fathers, their husbands'
fathers, their sons, their husbands' sons, their brothers, their
brothers' sons, their sisters' sons, their women, that which their
right hands possess, or those male attendants having no physical
desire, or children who are not yet aware of the private aspects of
women. And let them not stamp their feet to make known what they
conceal of their adornment. And turn to Allah in repentance, all of
you, O believers, that you might succeed.
Sunan Abu Daud The Prophet (ﷺ) brought Fatimah a slave which he
donated to her. Fatimah wore a garment which, when she covered her
head, did not reach her feet, and when she covered her feet by it,
that garment did not reach her head. When the Prophet (ﷺ) saw her
struggle, he said: There is no harm to you: Here is only your father
and slave.
They were however not permitted to have sexual relations with them in the way that men were allowed to have sexual relations with their female slaves.
There is a weak narration from the time of Caliph Umar ibn Khatab where a woman had intercourse with her slave. From Tafsir Ibn Kathir:
حدثنا سعيد عن قتادة أن امرأة اتخذت مملوكها، وقالت تأولت آية من كتاب
الله { أَوْ مَا مَلَكَتْ أَيْمَـٰنُهُمْ } فأتى بها عمر بن الخطاب رضي
الله عنه، وقال له ناس من أصحاب النبي صلى الله عليه وسلم تأولت آية من
كتاب الله عز وجل على غير وجهها، قال فغرب العبد وجز رأسه، وقال أنت بعده
حرام على كل مسلم، هذا أثر غريب منقطع
Qatatah narrated that a woman had intercourse with her slave and
presented this verse (23:6) in her defense. When Umar found out about
this he put forward the case infront of the Sahabah. The Sahabah said,
she has interpreted it wrongly,. On this Umar had the slave's head
shaved and exiled him and said to the woman: "After this every Muslim
is forbidden to you". This is weak\anamolous ... "