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Vulnerability Change Records for CVE-2022-49762

Change History

New CVE Received from kernel.org 5/01/2025 11:15:58 AM

Action Type Old Value New Value
Added Description

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

ntfs: check overflow when iterating ATTR_RECORDs

Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). 
Because the ATTR_RECORDs are next to each other, kernel can get the next
ATTR_RECORD from end address of current ATTR_RECORD, through current
ATTR_RECORD length field.

The problem is that during iteration, when kernel calculates the end
address of current ATTR_RECORD, kernel may trigger an integer overflow bug
in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`.  This
may wrap, leading to a forever iteration on 32bit systems.

This patch solves it by adding some checks on calculating end address
of current ATTR_RECORD during iteration.
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475b
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dab