GHSA-RW66-9H9X-4VJF

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31
VLAI
Details

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

dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()

When dma_device_put() drops the last reference on chan->device->ref, dma_device_release() runs and may free the dma_device along with its channels.

dma_chan_put() then still reads chan->device->owner via dma_chan_to_owner() for the trailing module_put(). KASAN catches it:

slab-use-after-free in dma_chan_put+0x3e6/0x4c0
Read of size 8 by task insmod/6319
Freed by task 6319:
  kfree+0x225/0x470
  dma_chan_put+0x395/0x4c0
  dmaengine_put+0xf8/0x160

Cache the module owner in dma_chan_put() before the put so the trailing module_put() does not need chan->device.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98343"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:27Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()\n\nWhen dma_device_put() drops the last reference on chan-\u003edevice-\u003eref,\ndma_device_release() runs and may free the dma_device along with its\nchannels.\n\ndma_chan_put() then still reads chan-\u003edevice-\u003eowner via\ndma_chan_to_owner() for the trailing module_put(). KASAN catches it:\n\n\tslab-use-after-free in dma_chan_put+0x3e6/0x4c0\n\tRead of size 8 by task insmod/6319\n\tFreed by task 6319:\n\t  kfree+0x225/0x470\n\t  dma_chan_put+0x395/0x4c0\n\t  dmaengine_put+0xf8/0x160\n\nCache the module owner in dma_chan_put() before the put so the trailing\nmodule_put() does not need chan-\u003edevice.",
  "id": "GHSA-rw66-9h9x-4vjf",
  "modified": "2026-10-06T09:31:36Z",
  "published": "2026-10-06T09:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98343"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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