{
  "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-2021-47376",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47376",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T15:03:39.738Z",
    "updatedAt": "2026-05-11T13:53:30.823Z",
    "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": "bpf: Add oversize check before call kvcalloc()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add oversize check before call kvcalloc()\n\nCommit 7661809d493b (\"mm: don't allow oversized kvmalloc() calls\") add the\noversize check. When the allocation is larger than what kmalloc() supports,\nthe following warning triggered:\n\nWARNING: CPU: 0 PID: 8408 at mm/util.c:597 kvmalloc_node+0x108/0x110 mm/util.c:597\nModules linked in:\nCPU: 0 PID: 8408 Comm: syz-executor221 Not tainted 5.14.0-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:kvmalloc_node+0x108/0x110 mm/util.c:597\nCall Trace:\n kvmalloc include/linux/mm.h:806 [inline]\n kvmalloc_array include/linux/mm.h:824 [inline]\n kvcalloc include/linux/mm.h:829 [inline]\n check_btf_line kernel/bpf/verifier.c:9925 [inline]\n check_btf_info kernel/bpf/verifier.c:10049 [inline]\n bpf_check+0xd634/0x150d0 kernel/bpf/verifier.c:13759\n bpf_prog_load kernel/bpf/syscall.c:2301 [inline]\n __sys_bpf+0x11181/0x126e0 kernel/bpf/syscall.c:4587\n __do_sys_bpf kernel/bpf/syscall.c:4691 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:4689 [inline]\n __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4689\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35",
              "status": "affected",
              "versionType": "git",
              "lessThan": "93937596e0652d50973f9dc944fea1694ac8cdfd"
            },
            {
              "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6345a0bee80139ea00a341c4202ebfd1534b5eb0"
            },
            {
              "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b5fe7cdfee5901ce5513c30e554d51536e003bde"
            },
            {
              "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0e6491b559704da720f6da09dd0a52c4df44c514"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.0"
            },
            {
              "version": "5.4.150",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.70",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.14.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.14.*"
            },
            {
              "version": "5.15",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}