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CVE-2024-40970
published 2024-07-12

CVE-2024-40970: In the Linux kernel, the following vulnerability has been resolved: Avoid hw_desc array overrun in dw-axi-dmac I have a use case where nr_buffers = 3 and in…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.30%
22.7th percentile
In the Linux kernel, the following vulnerability has been resolved: Avoid hw_desc array overrun in dw-axi-dmac I have a use case where nr_buffers = 3 and in which each descriptor is composed by 3 segments, resulting in the DMA channel descs_allocated to be 9. Since axi_desc_put() handles the hw_desc considering the descs_allocated, this scenario would result in a kernel panic (hw_desc array will be overrun). To fix this, the proposal is to add a new member to the axi_dma_desc structure, where we keep the number of allocated hw_descs (axi_desc_alloc()) and use it in axi_desc_put() to handle the hw_desc array correctly. Additionally I propose to remove the axi_chan_start_first_queued() call after completing the transfer, since it was identified that unbalance can occur (started descriptors can be interrupted and transfer ignored due to DMA channel not being enabled).

Affected

17 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.99-1 (bookworm)linux 6.1.99-1 (bookworm)
debianlinux-6.1< linux 6.1.99-1 (bookworm)linux 6.1.99-1 (bookworm)
linuxlinux
linuxlinux>= ef6fb2d6f1abd56cc067c694253ea362159b5ac3 < 7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e57c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5
linuxlinux>= ef6fb2d6f1abd56cc067c694253ea362159b5ac3 < dd42570018f5962c10f215ad9c21274ed5d3541edd42570018f5962c10f215ad9c21274ed5d3541e
linuxlinux>= ef6fb2d6f1abd56cc067c694253ea362159b5ac3 < e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66
linuxlinux>= ef6fb2d6f1abd56cc067c694253ea362159b5ac3 < 9004784e8d68bcd1ac1376407ba296fa28f04dbe9004784e8d68bcd1ac1376407ba296fa28f04dbe
linuxlinux>= ef6fb2d6f1abd56cc067c694253ea362159b5ac3 < 333e11bf47fa8d477db90e2900b1ed3c9ae9b697333e11bf47fa8d477db90e2900b1ed3c9ae9b697
linuxlinux_kernel< 5.15.1625.15.162
linuxlinux_kernel>= 0 < 6.1.99-16.1.99-1
linuxlinux_kernel>= 0 < 6.9.7-16.9.7-1
linuxlinux_kernel>= 0 < 6.9.7-16.9.7-1
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-44.446.8.0-44.44
linuxlinux_kernel>= 5.16 < 6.1.966.1.96
linuxlinux_kernel>= 6.2 < 6.6.366.6.36
linuxlinux_kernel>= 6.7 < 6.9.76.9.7

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_ubuntu6.3MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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