{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80792",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.793Z",
        "datePublished": "2026-09-04T15:13:04.537Z",
        "dateUpdated": "2026-10-19T08:43:45.535Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:43:45.535Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix use-after-free in ip6_finish_output2()\n\nip6_finish_output2() caches a pointer to the IPv6 destination\naddress (daddr) before invoking lwtunnel_xmit().  The LWT-BPF\ntransmit path or other encapsulation operations within\nlwtunnel_xmit() can reallocate the skb head, freeing the memory\nthat daddr points to.  When lwtunnel_xmit() returns\nLWTUNNEL_XMIT_CONTINUE, the function continues to use the stale\ndaddr pointer to compute the nexthop and to look up or create the\nneighbour entry.  This results in a use-after-free read, which can\nleak sensitive kernel data, pollute the neighbour table with\narbitrary values, misdirect traffic, or crash the system.\n\nFix this by re-fetching the IPv6 header and the destination\naddress pointer after lwtunnel_xmit() returns\nLWTUNNEL_XMIT_CONTINUE, ensuring that the subsequent nexthop\ncomputation and neighbour lookup operate on valid memory."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv6/ip6_output.c"
                    ],
                    "versions": [
                        {
                            "version": "4132c4ad00ddbf3a175ea0d2c775b662a32f4c85",
                            "lessThan": "75e0a544ebe9af663ef53ca21e9e9185c51fb54a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "c95f01b78266828a57060d754fcbfc92123a98ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "d960881b9312e781a3429aabceb223ce6b7c882f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "087ee0d914aaae929f1660c9ca878e367655ba1a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "3c770ac4e6f07af7c7b40c474a3efc61ffed7862",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "3dc98e5fe82d069dd29b124ffbdb679331dfea43",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "99219c82804f266189388e8bf1cf5135d10d5515",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "73a187384a8c8b983c7fea046d716b6752a1e7a3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2",
                            "lessThan": "d0d48d999b0eee6bb176ef4e39d9be868fa80f7e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1598154fd28ffa4a55beae1970475fd6776554b6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.233",
                            "lessThan": "5.10.267",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.289",
                            "lessThan": "5.5",
                            "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/ipv6/ip6_output.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.267",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.218",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.185",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.154",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.106",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.47",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.11",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.1",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "5.10.233",
                                    "versionEndExcluding": "5.10.267"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "5.15.218"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.1.185"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.6.154"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.12.106"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.18.47"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "7.1.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "7.2.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4.289"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/75e0a544ebe9af663ef53ca21e9e9185c51fb54a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c95f01b78266828a57060d754fcbfc92123a98ed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d960881b9312e781a3429aabceb223ce6b7c882f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/087ee0d914aaae929f1660c9ca878e367655ba1a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3c770ac4e6f07af7c7b40c474a3efc61ffed7862"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3dc98e5fe82d069dd29b124ffbdb679331dfea43"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99219c82804f266189388e8bf1cf5135d10d5515"
                },
                {
                    "url": "https://git.kernel.org/stable/c/73a187384a8c8b983c7fea046d716b6752a1e7a3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d0d48d999b0eee6bb176ef4e39d9be868fa80f7e"
                }
            ],
            "title": "ipv6: fix use-after-free in ip6_finish_output2()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}