{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-46992",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "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"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "0ed6389c483d",
                                            "version_value": "2824cafc6a93"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.9",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "4.9",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.14.233",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.191",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.120",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.38",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.11.22",
                                                        "lessThanOrEqual": "5.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.12.5",
                                                        "lessThanOrEqual": "5.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.13",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/2824cafc6a93792d9ad85939c499161214d84c4b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/2824cafc6a93792d9ad85939c499161214d84c4b"
            },
            {
                "url": "https://git.kernel.org/stable/c/efcd730ddd6f25578bd31bfe703e593e2421d708",
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                "name": "https://git.kernel.org/stable/c/efcd730ddd6f25578bd31bfe703e593e2421d708"
            },
            {
                "url": "https://git.kernel.org/stable/c/c77e2ef18167ad334e27610ced9a7f6af5ec1787",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c77e2ef18167ad334e27610ced9a7f6af5ec1787"
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/72b49dd116ca00a46a11d5a4d8d7987f05ed9cd7"
            },
            {
                "url": "https://git.kernel.org/stable/c/1e8ab479cfbe5751efccedb95afb9b112a5ba475",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/1e8ab479cfbe5751efccedb95afb9b112a5ba475"
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                "url": "https://git.kernel.org/stable/c/a388d10961ff8578b1a6691945d406c0f33aa71b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a388d10961ff8578b1a6691945d406c0f33aa71b"
            },
            {
                "url": "https://git.kernel.org/stable/c/a54754ec9891830ba548e2010c889e3c8146e449",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a54754ec9891830ba548e2010c889e3c8146e449"
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        ]
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    "generator": {
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}