{
  "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-2022-50145",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50145",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-06-18T11:03:06.312Z",
    "updatedAt": "2026-08-05T08:57:32.722Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "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: sf-pdma: Add multithread support for a DMA channel",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: Add multithread support for a DMA channel\n\nWhen we get a DMA channel and try to use it in multiple threads it\nwill cause oops and hanging the system.\n\n% echo 64 > /sys/module/dmatest/parameters/threads_per_chan\n% echo 10000 > /sys/module/dmatest/parameters/iterations\n% echo 1 > /sys/module/dmatest/parameters/run\n[   89.480664] Unable to handle kernel NULL pointer dereference at virtual\n               address 00000000000000a0\n[   89.488725] Oops [#1]\n[   89.494708] CPU: 2 PID: 1008 Comm: dma0chan0-copy0 Not tainted\n               5.17.0-rc5\n[   89.509385] epc : vchan_find_desc+0x32/0x46\n[   89.513553]  ra : sf_pdma_tx_status+0xca/0xd6\n\nThis happens because of data race. Each thread rewrite channels's\ndescriptor as soon as device_prep_dma_memcpy() is called. It leads to the\nsituation when the driver thinks that it uses right descriptor that\nactually is freed or substituted for other one.\n\nWith current fixes a descriptor changes its value only when it has\nbeen used. A new descriptor is acquired from vc->desc_issued queue that\nis already filled with descriptors that are ready to be sent. Threads\nhave no direct access to DMA channel descriptor. Now it is just possible\nto queue a descriptor for further processing.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6973886ad58e6b4988813331abb76ae0b364a9c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11"
            },
            {
              "version": "6973886ad58e6b4988813331abb76ae0b364a9c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5ab2782c944e324008ef5d658f2494a9f0e3c5ac"
            },
            {
              "version": "6973886ad58e6b4988813331abb76ae0b364a9c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4c7350b1dd8a192af844de32fc99b9e34c876fda"
            },
            {
              "version": "6973886ad58e6b4988813331abb76ae0b364a9c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a93b3f1e11971a91b6441b6d47488f4492cc113f"
            },
            {
              "version": "6973886ad58e6b4988813331abb76ae0b364a9c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.137",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.61",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.18.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "version": "5.19.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "version": "6.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}