CVE-2024-40970

CVE Details

Release Date:2024-07-12

Description


In the Linux kernel, the following vulnerability has been resolved:\nAvoid hw_desc array overrun in dw-axi-dmac\nI have a use case where nr_buffers = 3 and in which each descriptor is composed by 3\nsegments, resulting in the DMA channel descs_allocated to be 9. Since axi_desc_put()\nhandles the hw_desc considering the descs_allocated, this scenario would result in a\nkernel panic (hw_desc array will be overrun).\nTo fix this, the proposal is to add a new member to the axi_dma_desc structure,\nwhere we keep the number of allocated hw_descs (axi_desc_alloc()) and use it in\naxi_desc_put() to handle the hw_desc array correctly.\nAdditionally I propose to remove the axi_chan_start_first_queued() call after completing\nthe transfer, since it was identified that unbalance can occur (started descriptors can\nbe interrupted and transfer ignored due to DMA channel not being enabled).

See more information about CVE-2024-40970 from MITRE CVE dictionary and NIST NVD


CVSS Scoring


NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score: 5.6 CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
Attack Vector: Local network Attack Complexity: Low
Privileges Required: High User Interaction: None
Scope: Unchanged Confidentiality Impact: Low
Integrity Impact: Low Availability Impact: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 8 (kernel-uek)ELSA-2024-126182024-09-12
Oracle Linux version 9 (kernel-uek)ELSA-2024-126182024-09-12


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