{
  "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-2021-47564",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47564",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-24T15:12:52.129Z",
    "updatedAt": "2026-05-11T13:57:03.918Z",
    "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": "net: marvell: prestera: fix double free issue on err path",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix double free issue on err path\n\nfix error path handling in prestera_bridge_port_join() that\ncases prestera driver to crash (see below).\n\n Trace:\n   Internal error: Oops: 96000044 [#1] SMP\n   Modules linked in: prestera_pci prestera uio_pdrv_genirq\n   CPU: 1 PID: 881 Comm: ip Not tainted 5.15.0 #1\n   pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n   pc : prestera_bridge_destroy+0x2c/0xb0 [prestera]\n   lr : prestera_bridge_port_join+0x2cc/0x350 [prestera]\n   sp : ffff800011a1b0f0\n   ...\n   x2 : ffff000109ca6c80 x1 : dead000000000100 x0 : dead000000000122\n    Call trace:\n   prestera_bridge_destroy+0x2c/0xb0 [prestera]\n   prestera_bridge_port_join+0x2cc/0x350 [prestera]\n   prestera_netdev_port_event.constprop.0+0x3c4/0x450 [prestera]\n   prestera_netdev_event_handler+0xf4/0x110 [prestera]\n   raw_notifier_call_chain+0x54/0x80\n   call_netdevice_notifiers_info+0x54/0xa0\n   __netdev_upper_dev_link+0x19c/0x380",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "e1189d9a5fbec8153dbe03f3589bc2baa96694e2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5dca8eff4627315df98feec09fff9dfe3356325e"
            },
            {
              "version": "e1189d9a5fbec8153dbe03f3589bc2baa96694e2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "03e5203d2161a00afe4d97d206d2293e40b2f253"
            },
            {
              "version": "e1189d9a5fbec8153dbe03f3589bc2baa96694e2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8d032507cb7912baf1d3e0af54516f823befefd"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.10"
            },
            {
              "version": "5.10.83",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.16",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}