FKIE_CVE-2026-98343

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dmaengine.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b92c502595336a3cc5bb7a060170891366745a5d",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "855187a88bdf762c46b6849307597e3e02bfc1d9",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "c9780b601438137494b407eb4301bb3de2587ac9",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "07eb075b60d565a5e465a1945a80cc62807492ad",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "9319dd64d5cdef851841c091f30424faa2284c31",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "6cf31716b77a71c0d634106f4f3951377b8dc6dc",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "02bd02c585293634b213b142cba63cbf77891f6b",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            },
            {
              "lessThan": "e873c74132f0c5f1452816cd9bb26208f0bba1e1",
              "status": "affected",
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dmaengine.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-98343",
  "lastModified": "2026-10-06T09:18:27.163",
  "metrics": {},
  "published": "2026-10-06T09:18:27.163",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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