{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80636",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.777Z",
        "datePublished": "2026-08-28T06:48:50.241Z",
        "dateUpdated": "2026-08-28T06:48:50.241Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-28T06:48:50.241Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: revert ct extension genid infrastructure\n\nThis infrastructure is not used anymore after moving ct timeout and\nhelper to use datapath refcount to track object use.\n\nRevert commit c56716c69ce1 (\"netfilter: extensions: introduce extension\ngenid count\") this patch disables all ct extensions (leading to NULL)\nfor unconfirmed conntracks, when this is only targeted at ct helper and\nct timeout. There is also codebase that dereferences the ct extension\nwithout checking for NULL which could lead to crash."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/netfilter/nf_conntrack_extend.h",
                        "net/netfilter/nf_conntrack_core.c",
                        "net/netfilter/nf_conntrack_extend.c"
                    ],
                    "versions": [
                        {
                            "version": "c56716c69ce1ac320432fb1ea5654196ba24d2f8",
                            "lessThan": "6bba4846f196d081bf553391d12b5a73dcc48685",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c56716c69ce1ac320432fb1ea5654196ba24d2f8",
                            "lessThan": "61eab1d0237eb513fe73e391a5926ee70092c325",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c56716c69ce1ac320432fb1ea5654196ba24d2f8",
                            "lessThan": "d53eecbca16f056abba274075cb15120ab062518",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c56716c69ce1ac320432fb1ea5654196ba24d2f8",
                            "lessThan": "a052a94bcc629acaecc2ce42a4af77f8fa399757",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c56716c69ce1ac320432fb1ea5654196ba24d2f8",
                            "lessThan": "35e21a4dccc5c255ba59ccfbfeb4629ed21da972",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/netfilter/nf_conntrack_extend.h",
                        "net/netfilter/nf_conntrack_core.c",
                        "net/netfilter/nf_conntrack_extend.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "5.19",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/6bba4846f196d081bf553391d12b5a73dcc48685"
                },
                {
                    "url": "https://git.kernel.org/stable/c/61eab1d0237eb513fe73e391a5926ee70092c325"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d53eecbca16f056abba274075cb15120ab062518"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a052a94bcc629acaecc2ce42a4af77f8fa399757"
                },
                {
                    "url": "https://git.kernel.org/stable/c/35e21a4dccc5c255ba59ccfbfeb4629ed21da972"
                }
            ],
            "title": "netfilter: conntrack: revert ct extension genid infrastructure",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}