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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-98343

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98343

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "b92c502595336a3cc5bb7a060170891366745a5d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "855187a88bdf762c46b6849307597e3e02bfc1d9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "c9780b601438137494b407eb4301bb3de2587ac9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "07eb075b60d565a5e465a1945a80cc62807492ad",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "9319dd64d5cdef851841c091f30424faa2284c31",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "6cf31716b77a71c0d634106f4f3951377b8dc6dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "02bd02c585293634b213b142cba63cbf77891f6b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
        "lessThan": "e873c74132f0c5f1452816cd9bb26208f0bba1e1",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/dma/dmaengine.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.6",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.54",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/dma/dmaengine.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98343

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38422 · Revision 1
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Publisher date
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