CVE-2024-40970

MEDIUM EPSS 20.6%
Published Jul 12, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 12, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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).

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
20.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel* <5.15.162
linuxlinux_kernel*≥5.16  –  <6.1.96
linuxlinux_kernel*≥6.2  –  <6.6.36
linuxlinux_kernel*≥6.7  –  <6.9.7

References 6

  • git.kernel.org https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66
    Patch