{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98573",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.358Z",
        "datePublished": "2026-10-18T15:18:38.914Z",
        "dateUpdated": "2026-10-19T09:21:58.681Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:21:58.681Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()\n\nskb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max\nargument and passes the result to __pskb_pull_tail() as a signed int.  The\nfunction does not ensure that max is at least skb_headlen(skb).\n\nThis can happen while parsing IPv6 extension headers when an skb already\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data\nbeyond the linear area, max - skb_headlen(skb) wraps and is converted to a\nnegative delta.  __pskb_pull_tail() then passes that negative length to\nskb_copy_bits(), where it can become a very large copy length.\n\nPass the requested length itself as the pull bound at the three\nextension-header call sites, so the delta can no longer go negative."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/core/skbuff.c"
                    ],
                    "versions": [
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "9c4e432132a97b82edf28fa172c39f743e6bfb26",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "718747afa5463d9cc5fd9a09f03b2a492edd9b78",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "a0ad0473c09d2e947aecac5c82e637ec85924b12",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "b2da5ed3d8c75e1b729a21b6d3beaed415e263f6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "d7f474226809471dc7877435e9c492cc914df0bf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3",
                            "lessThan": "3b4e0b0c008a8c1b474730248cd5b873026c74bd",
                            "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/core/skbuff.c"
                    ],
                    "versions": [
                        {
                            "version": "3.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.112",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.55",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.9",
                            "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": "3.13",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.12.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.18.55"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "7.2.9"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26"
                },
                {
                    "url": "https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd"
                }
            ],
            "title": "net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}