{
  "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-2021-46992",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-46992",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-28T08:13:17.814Z",
    "updatedAt": "2026-08-05T08:45:25.713Z",
    "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": "netfilter: nftables: avoid overflows in nft_hash_buckets()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nftables: avoid overflows in nft_hash_buckets()\n\nNumber of buckets being stored in 32bit variables, we have to\nensure that no overflows occur in nft_hash_buckets()\n\nsyzbot injected a size == 0x40000000 and reported:\n\nUBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13\nshift exponent 64 is too large for 64-bit type 'long unsigned int'\nCPU: 1 PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nCall Trace:\n __dump_stack lib/dump_stack.c:79 [inline]\n dump_stack+0x141/0x1d7 lib/dump_stack.c:120\n ubsan_epilogue+0xb/0x5a lib/ubsan.c:148\n __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327\n __roundup_pow_of_two include/linux/log2.h:57 [inline]\n nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline]\n nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652\n nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline]\n nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322\n nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline]\n nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\n sock_sendmsg_nosec net/socket.c:654 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:674\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\n do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2824cafc6a93792d9ad85939c499161214d84c4b"
            },
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "efcd730ddd6f25578bd31bfe703e593e2421d708"
            },
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c77e2ef18167ad334e27610ced9a7f6af5ec1787"
            },
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "72b49dd116ca00a46a11d5a4d8d7987f05ed9cd7"
            },
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1e8ab479cfbe5751efccedb95afb9b112a5ba475"
            },
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a388d10961ff8578b1a6691945d406c0f33aa71b"
            },
            {
              "version": "0ed6389c483dc77cdbdd48de0ca7ce41723dd667",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a54754ec9891830ba548e2010c889e3c8146e449"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.9"
            },
            {
              "version": "4.14.233",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.191",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.120",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.38",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.11.22",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.11.*"
            },
            {
              "version": "5.12.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}