{
  "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-2021-4441",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-4441",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-08-22T01:30:04.687Z",
    "updatedAt": "2026-05-11T13:44:00.355Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "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": "spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()\n\nIn zynq_qspi_exec_mem_op(), kzalloc() is directly used in memset(),\nwhich could lead to a NULL pointer dereference on failure of\nkzalloc().\n\nFix this bug by adding a check of tmpbuf.\n\nThis bug was found by a static analyzer. The analysis employs\ndifferential checking to identify inconsistent security operations\n(e.g., checks or kfrees) between two code paths and confirms that the\ninconsistent operations are not recovered in the current function or\nthe callers, so they constitute bugs.\n\nNote that, as a bug found by static analysis, it can be a false\npositive or hard to trigger. Multiple researchers have cross-reviewed\nthe bug.\n\nBuilds with CONFIG_SPI_ZYNQ_QSPI=m show no new warnings,\nand our static analyzer no longer warns about this code.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "67dca5e580f1e93a66177389981541cac208c817",
              "status": "affected",
              "versionType": "git",
              "lessThan": "df14d2bed8e2455878e046e67123d9ecb2e79056"
            },
            {
              "version": "67dca5e580f1e93a66177389981541cac208c817",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2efece1368aeee2d2552c7ec36aeb676c4d4c95f"
            },
            {
              "version": "67dca5e580f1e93a66177389981541cac208c817",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c32405d6474a21f7d742828e73c13e326dcae82"
            },
            {
              "version": "67dca5e580f1e93a66177389981541cac208c817",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b9dd08cbebe0c593c49bf86d2012a431494e54cb"
            },
            {
              "version": "67dca5e580f1e93a66177389981541cac208c817",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ab3824427b848da10e9fe2727f035bbeecae6ff4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.2"
            },
            {
              "version": "5.4.182",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.103",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.26",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.16.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.16.*"
            },
            {
              "version": "5.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}