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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database

Vulnerability Change Records for CVE-2022-49699

Change History

New CVE Received from kernel.org 2/26/2025 2:01:44 AM

Action Type Old Value New Value
Added Description 

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

filemap: Handle sibling entries in filemap_get_read_batch()

If a read races with an invalidation followed by another read, it is
possible for a folio to be replaced with a higher-order folio.  If that
happens, we'll see a sibling entry for the new folio in the next iteration
of the loop.  This manifests as a NULL pointer dereference while holding
the RCU read lock.

Handle this by simply returning.  The next call will find the new folio
and handle it correctly.  The other ways of handling this rare race are
more complex and it's just not worth it.

								
								
					

					

						Added
						Reference
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
https://git.kernel.org/stable/c/a66f131d30e53000f08301776bf85c912ef47aad

								
								
					

					

						Added
						Reference
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
https://git.kernel.org/stable/c/cb995f4eeba9d268fd4b56c2423ad6c1d1ea1b82