{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-98344",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98344",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-06T08:46:33.997Z",
    "updatedAt": "2026-10-19T09:17:55.263Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "dmaengine: Fix device kref underflow in dma_chan_put()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: Fix device kref underflow in dma_chan_put()\n\ndma_chan_get() takes chan->device->ref only on the slow path:\n\n\t/* no kref on fast path */\n\tif (chan->client_count) {\n\t\t__module_get(owner);\n\t\tchan->client_count++;\n\t\treturn 0;\n\t}\n\tif (!try_module_get(owner))\n\t\treturn -ENODEV;\n\tif (!dma_device_get(chan->device)) { // calls kref_get_unless_zero()\n\ndma_chan_put() drops the ref unconditionally, so every fast-path\nget/put pair drops one extra device reference.\n\nThe bug fires when two conditions hold together: a non-private\nprovider has a persistent client holding chan->client_count > 0\nand another client cycles dmaengine_get()/dmaengine_put().\nWhen the kref hits zero, the subsequent dma_find_channel() returns\nNULL even though the provider module is still loaded.\n\nFix this by dropping device->ref only on the last put, matching the\nsingle slow-path get.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "036b527f92570206da4b8c40b38f8d689e29d0f3"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5fb1797a8c9485e40e5492fa0338ab5c7d1f3fef"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "57f7f1c6827be7d8f80feca48d2125fb91c6f6ed"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7c3f4ce651d43705f9ec7f778f642a90d5ff4fba"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "de2677e57d3161390d8a508f08cddec6ef7e4b23"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1a0d9b406febf23054ad595fd47b29325e70fb2d"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "77906ac448d2fa81fa710ae26c0e591ebdc81154"
            },
            {
              "version": "8ad342a863590b24ce77681b7e081363fb3333f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "44dab659064eb5c10adb0306510eebe848ed592d"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.6",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.6"
            },
            {
              "version": "5.10.271",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.222",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.112",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.54",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}