Tory Lanez Stabbed in Prison, Rushed to Hospital

1:40 PM PT -- A rep for the California Department of Corrections and Rehabilitation confirms to TMZ ... Tory Lanez was attacked by another prisoner in a housing unit at California Correctional Institution (CCI) in Tehachapi around 7:20 this morning.

Prison staff dashed to the scene and began administering first aid to Tory after calling 911. Tory was then rushed to a hospital off prison grounds to receive more treatment. The CDCR spokesperson did not disclose Tory's current condition.

This isn't how Tory Lanez wants to get out of prison, but he is -- after suffering a prison yard stabbing so bad, he needs hospital treatment ... TMZ has learned.

Tory was in the yard of California Correctional Institution at Tehachapi Monday morning when another inmate stabbed him ... according to multiple sources, including one in law enforcement.

It's unclear what the motivation was for the attack, but one source tells us Tory was rushed by ambulance to a nearby civilian hospital in Bakersfield.

Just last week, he posted a pic of himself looking pretty buff behind bars, and bragging his next album would be dropping soon.

The artist is serving a 10-year sentence at the California state prison for the 2020 shooting of Megan Thee Stallion.

Tory and Megan are still battling each other in court -- she's accusing him of enlisting various bloggers to continue publicly smearing and cyberstalking her.

We're told Tory's stabbing injury is non-life-threatening.