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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database

Vulnerability Change Records for CVE-2025-21837

Change History

New CVE Received from kernel.org 3/07/2025 4:15:16 AM

Action Type Old Value New Value
Added Description 

								
							
							
								
							
						
								
							
								
In the Linux kernel, the following vulnerability has been resolved:

io_uring/uring_cmd: unconditionally copy SQEs at prep time

This isn't generally necessary, but conditions have been observed where
SQE data is accessed from the original SQE after prep has been done and
outside of the initial issue. Opcode prep handlers must ensure that any
SQE related data is stable beyond the prep phase, but uring_cmd is a bit
special in how it handles the SQE which makes it susceptible to reading
stale data. If the application has reused the SQE before the original
completes, then that can lead to data corruption.

Down the line we can relax this again once uring_cmd has been sanitized
a bit, and avoid unnecessarily copying the SQE.

								
								
					

					

						Added
						Reference
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
https://git.kernel.org/stable/c/87fe1d68842a308998b315c8ed0163a1d639017c

								
								
					

					

						Added
						Reference
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
https://git.kernel.org/stable/c/d6211ebbdaa541af197b50b8dd8f22642ce0b87f