{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ef6fb2d6f1abd56cc067c694253ea362159b5ac3"
            },
            {
              "fixed": "7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5"
            },
            {
              "fixed": "dd42570018f5962c10f215ad9c21274ed5d3541e"
            },
            {
              "fixed": "e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66"
            },
            {
              "fixed": "9004784e8d68bcd1ac1376407ba296fa28f04dbe"
            },
            {
              "fixed": "333e11bf47fa8d477db90e2900b1ed3c9ae9b697"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40970.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nAvoid hw_desc array overrun in dw-axi-dmac\n\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).\n\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.\n\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).",
  "id": "CVE-2024-40970",
  "modified": "2026-03-13T21:47:09.935763182Z",
  "published": "2024-07-12T12:32:08.788Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40970.json"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40970"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "Avoid hw_desc array overrun in dw-axi-dmac"
}