{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53566",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-10-04T15:14:15.924Z",
        "datePublished": "2025-10-04T15:17:08.598Z",
        "dateUpdated": "2026-05-23T15:29:34.476Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:29:34.476Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_rbtree: fix null deref on element insertion\n\nThere is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem():\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\n nft_add_set_elem+0x14b0/0x2990\n  nf_tables_newsetelem+0x528/0xb30\n\nFurthermore, there is a possible use-after-free while iterating,\n'node' can be free'd so we need to cache the next value to use."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nft_set_rbtree.c"
                    ],
                    "versions": [
                        {
                            "version": "7ab87a326f20c52ff4d9972052d085be951c704b",
                            "lessThan": "b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "181859bdfb9734aca449512fccaee4cacce64aed",
                            "lessThan": "899aa5638568abf5d69de7a7bb95e4615157375b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4aacf3d78424293e318c616016865380b37b9cc5",
                            "lessThan": "3fa13203b6d90cc3a33af47b058739f92ab82eef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2bf1435fa19d2c58054391b3bba40d5510a5758c",
                            "lessThan": "ec5caa765f7f6960011c919c9aeb1467940421f6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "318cb24a4c3fce8140afaf84e4d45fcb76fb280b",
                            "lessThan": "a836be60a3aabcedcd9c79f545d409ace1f20ba6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c9e6978e2725a7d4b6cd23b2facd3f11422c0643",
                            "lessThan": "a337706c1fb35aac3f26b48aca80421bdbe1d33a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c9e6978e2725a7d4b6cd23b2facd3f11422c0643",
                            "lessThan": "61ae320a29b0540c16931816299eb86bf2b66c08",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.166",
                            "lessThan": "5.10.181",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.91",
                            "lessThan": "5.15.113",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.9",
                            "lessThan": "6.1.30",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nft_set_rbtree.c"
                    ],
                    "versions": [
                        {
                            "version": "6.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.181",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.113",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.30",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3.4",
                            "lessThanOrEqual": "6.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10.166",
                                    "versionEndExcluding": "5.10.181"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.91",
                                    "versionEndExcluding": "5.15.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.9",
                                    "versionEndExcluding": "6.1.30"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.3.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56"
                },
                {
                    "url": "https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08"
                }
            ],
            "title": "netfilter: nft_set_rbtree: fix null deref on element insertion",
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}