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Vulnerability Change Records for CVE-2022-49112

Change History

New CVE Received from kernel.org 2/26/2025 2:00:48 AM

Action Type Old Value New Value
Added Description

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

mt76: fix monitor mode crash with sdio driver

mt7921s driver may receive frames with fragment buffers. If there is a
CTS packet received in monitor mode, the payload is 10 bytes only and
need 6 bytes header padding after RXD buffer. However, only RXD in the
first linear buffer, if we pull buffer size RXD-size+6 bytes with
skb_pull(), that would trigger "BUG_ON(skb->len < skb->data_len)" in
__skb_pull().

To avoid the nonlinear buffer issue, enlarge the RXD size from 128 to
256 to make sure all MCU operation in linear buffer.

[   52.007562] kernel BUG at include/linux/skbuff.h:2313!
[   52.007578] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[   52.007987] pc : skb_pull+0x48/0x4c
[   52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common]
[   52.008361] Call trace:
[   52.008377]  skb_pull+0x48/0x4c
[   52.008400]  mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c]
[   52.008431]  __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917]
[   52.008449]  kthread+0x148/0x3ac
[   52.008466]  ret_from_fork+0x10/0x30
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/123bc712b1de0805f9d683687e17b1ec2aba0b68
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/13946d5a68efd11dd6af2f6ef4c908f6b00158a5
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/95e2af01669c7a3cb7a933cefa06361f9db15059
Added Reference

								
							
							
						
https://git.kernel.org/stable/c/c37b4cab3d97ef64b206fca4d9daabd9aff7356e