{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74597",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.919Z",
        "datePublished": "2026-08-22T15:31:47.120Z",
        "dateUpdated": "2026-08-22T15:31:47.120Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-22T15:31:47.120Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_tunnel: clear skb2->cb[] in ip6ip6_err()\n\nip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the\nquoted inner IPv6 packet, and then passes the clone to icmpv6_send().\nThe clone still carries the outer packet's inet6_skb_parm in skb->cb.\n\nIf the outer packet had a Home Address Option, IP6CB(skb2)->dsthao\nremains non-zero after skb_pull(). icmpv6_send() later calls\nmip6_addr_swap(), which uses that stale dsthao offset against the quoted\ninner packet. A malformed inner destination-options header can then make\nthe HAO lookup and address swap run past the end of the quoted packet\nand corrupt skb_shared_info.\n\nClear skb2->cb[] before pulling the quoted inner IPv6 packet so the\nreply path does not reuse metadata left by the outer IPv6 stack."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv6/ip6_tunnel.c"
                    ],
                    "versions": [
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "44fe898df302e91c5ee5acbc71ffa74e78e6c183",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "0dadb0620ab65949a8bc2439dd28ea3c942fe87d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "b6816536a2990c0db44a26130a03e40b441e829b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "64e41736a26f37ab6215bc2e6df125df05aceb08",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "484134e1eb07d700a73b1e4bbf3fb503e299be60",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "4eb15c465337b18f44716c499cd6ad63eee0ad54",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "fbf40faa0414b753212494ad197542002e66ed9e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8",
                            "lessThan": "f803c086399da277b5d0ff36a107d0f162751800",
                            "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/ipv6/ip6_tunnel.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.22",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.22",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.152",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.104",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.45",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.9",
                            "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": "2.6.22",
                                    "versionEndExcluding": "5.10.265"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "5.15.216"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.6.152"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.12.104"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.18.45"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "7.1.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08"
                },
                {
                    "url": "https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800"
                }
            ],
            "title": "ip6_tunnel: clear skb2->cb[] in ip6ip6_err()",
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                "engine": "bippy-1.2.0"
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    }
}