{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53218",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.392Z",
        "datePublished": "2026-06-25T08:39:21.069Z",
        "dateUpdated": "2026-06-25T08:39:21.069Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-25T08:39:21.069Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_exthdr: fix register tracking for F_PRESENT flag\n\nnft_exthdr_init() passes user-controlled priv->len to\nnft_parse_register_store(), which marks that many bytes in the\nregister bitmap as initialized.  However, when NFT_EXTHDR_F_PRESENT\nis set, the eval paths write only 1 byte (nft_reg_store8) or\n4 bytes (*dest = 0 on TCP/DCCP error path).  When len > 4,\nregisters beyond the first are never written, retaining\nuninitialized stack data from nft_regs.\n\nBail out if userspace requests too much data when F_PRESENT is set."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nft_exthdr.c"
                    ],
                    "versions": [
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "19748967d59c31d24d21d40b728570788310b237",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "46fc15a044e9938e7ea77786fb37edd2cd74f031",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "cd513e43b4b2bd1de39e2367bc4261c699a8652f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "67b27434c43b68a97becda98c9f0c8cf6cba2134",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "78069a6d8bc86c9e036eb82c2af4a19cc1871a53",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783",
                            "lessThan": "772cecf198da732faebb5dcfc46d66a505be8495",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nft_exthdr.c"
                    ],
                    "versions": [
                        {
                            "version": "4.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.94",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.36",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "4.11",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "5.15.210"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "6.1.176"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "6.6.143"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "6.12.94"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
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                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "7.0.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/19748967d59c31d24d21d40b728570788310b237"
                },
                {
                    "url": "https://git.kernel.org/stable/c/46fc15a044e9938e7ea77786fb37edd2cd74f031"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cd513e43b4b2bd1de39e2367bc4261c699a8652f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67b27434c43b68a97becda98c9f0c8cf6cba2134"
                },
                {
                    "url": "https://git.kernel.org/stable/c/78069a6d8bc86c9e036eb82c2af4a19cc1871a53"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265"
                },
                {
                    "url": "https://git.kernel.org/stable/c/772cecf198da732faebb5dcfc46d66a505be8495"
                }
            ],
            "title": "netfilter: nft_exthdr: fix register tracking for F_PRESENT flag",
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}