{
  "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-2021-46956",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-46956",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-27T18:46:58.101Z",
    "updatedAt": "2026-05-11T13:45:10.978Z",
    "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": "virtiofs: fix memory leak in virtio_fs_probe()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtiofs: fix memory leak in virtio_fs_probe()\n\nWhen accidentally passing twice the same tag to qemu, kmemleak ended up\nreporting a memory leak in virtiofs.  Also, looking at the log I saw the\nfollowing error (that's when I realised the duplicated tag):\n\n  virtiofs: probe of virtio5 failed with error -17\n\nHere's the kmemleak log for reference:\n\nunreferenced object 0xffff888103d47800 (size 1024):\n  comm \"systemd-udevd\", pid 118, jiffies 4294893780 (age 18.340s)\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff  ................\n  backtrace:\n    [<000000000ebb87c1>] virtio_fs_probe+0x171/0x7ae [virtiofs]\n    [<00000000f8aca419>] virtio_dev_probe+0x15f/0x210\n    [<000000004d6baf3c>] really_probe+0xea/0x430\n    [<00000000a6ceeac8>] device_driver_attach+0xa8/0xb0\n    [<00000000196f47a7>] __driver_attach+0x98/0x140\n    [<000000000b20601d>] bus_for_each_dev+0x7b/0xc0\n    [<00000000399c7b7f>] bus_add_driver+0x11b/0x1f0\n    [<0000000032b09ba7>] driver_register+0x8f/0xe0\n    [<00000000cdd55998>] 0xffffffffa002c013\n    [<000000000ea196a2>] do_one_initcall+0x64/0x2e0\n    [<0000000008f727ce>] do_init_module+0x5c/0x260\n    [<000000003cdedab6>] __do_sys_finit_module+0xb5/0x120\n    [<00000000ad2f48c6>] do_syscall_64+0x33/0x40\n    [<00000000809526b5>] entry_SYSCALL_64_after_hwframe+0x44/0xae",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "a62a8ef9d97da23762a588592c8b8eb50a8deb6a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "310efc95c72c13faf855c692d19cd4d054d827c8"
            },
            {
              "version": "a62a8ef9d97da23762a588592c8b8eb50a8deb6a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d19555ff225d0896a33246a49279e6d578095f15"
            },
            {
              "version": "a62a8ef9d97da23762a588592c8b8eb50a8deb6a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae"
            },
            {
              "version": "a62a8ef9d97da23762a588592c8b8eb50a8deb6a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5116e79fc6e6725b8acdad8b7e928a83ab7b47e6"
            },
            {
              "version": "a62a8ef9d97da23762a588592c8b8eb50a8deb6a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c79c5e0178922a9e092ec8fed026750f39dcaef4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.4",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.4"
            },
            {
              "version": "5.4.118",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.11.20",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.11.*"
            },
            {
              "version": "5.12.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}