{
  "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-2023-54020",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54020",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-24T10:55:50.583Z",
    "updatedAt": "2026-05-23T15:31:58.250Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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: pdma_desc memory leak fix",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: pdma_desc memory leak fix\n\nCommit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread support for a\nDMA channel\") changed sf_pdma_prep_dma_memcpy() to unconditionally\nallocate a new sf_pdma_desc each time it is called.\n\nThe driver previously recycled descs, by checking the in_use flag, only\nallocating additional descs if the existing one was in use. This logic\nwas removed in commit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread\nsupport for a DMA channel\"), but sf_pdma_free_desc() was not changed to\nhandle the new behaviour.\n\nAs a result, each time sf_pdma_prep_dma_memcpy() is called, the previous\ndescriptor is leaked, over time leading to memory starvation:\n\n  unreferenced object 0xffffffe008447300 (size 192):\n  comm \"irq/39-mchp_dsc\", pid 343, jiffies 4294906910 (age 981.200s)\n  hex dump (first 32 bytes):\n    00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00  ................\n    00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00  ..p.............\n  backtrace:\n    [<00000000064a04f4>] kmemleak_alloc+0x1e/0x28\n    [<00000000018927a7>] kmem_cache_alloc+0x11e/0x178\n    [<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112\n\nAdd the missing kfree() to sf_pdma_free_desc(), and remove the redundant\nin_use flag.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5ab2782c944e324008ef5d658f2494a9f0e3c5ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ad222c9af25e3f074c180e389b3477dce42afc4f"
            },
            {
              "version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "03fece43fa109beba7cc9948c02f5e2d1205d607"
            },
            {
              "version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8bd5040bd43f2b5ba3c898b09a3197a0c7ace126"
            },
            {
              "version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b02e07015a5ac7bbc029da931ae17914b8ae0339"
            },
            {
              "version": "b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4c7350b1dd8a192af844de32fc99b9e34c876fda",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "a93b3f1e11971a91b6441b6d47488f4492cc113f",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.61",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.99"
            },
            {
              "version": "5.10.137",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.11"
            },
            {
              "version": "5.18.18",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.19"
            },
            {
              "version": "5.19.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.20"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.0"
            },
            {
              "version": "5.15.99",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.2.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "version": "6.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}