CVE-2026-98343 (GCVE-0-2026-98343)
Vulnerability from cvelistv5
Published
2026-10-06 08:46
Modified
2026-10-19 09:17
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
Impacted products
Vendor Product Version
Linux Linux Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
Version: 8ad342a863590b24ce77681b7e081363fb3333f7
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dmaengine.c"
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          "vendor": "Linux",
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              "version": "0",
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            {
              "lessThanOrEqual": "5.15.*",
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              "lessThanOrEqual": "6.1.*",
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              "lessThanOrEqual": "6.12.*",
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              "version": "6.12.112",
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              "version": "6.18.54",
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              "version": "7.2.8",
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:17:54.287Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d"
        },
        {
          "url": "https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9"
        },
        {
          "url": "https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad"
        },
        {
          "url": "https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1"
        }
      ],
      "title": "dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98343",
    "datePublished": "2026-10-06T08:46:33.196Z",
    "dateReserved": "2026-09-25T10:25:14.343Z",
    "dateUpdated": "2026-10-19T09:17:54.287Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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