{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40240",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.181Z",
        "datePublished": "2025-12-04T15:31:29.715Z",
        "dateUpdated": "2026-06-16T19:41:24.741Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:45:30.172Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: avoid NULL dereference when chunk data buffer is missing\n\nchunk->skb pointer is dereferenced in the if-block where it's supposed\nto be NULL only.\n\nchunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list\ninstead and do it just before replacing chunk->skb. We're sure that\notherwise chunk->skb is non-NULL because of outer if() condition."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sctp/inqueue.c"
                    ],
                    "versions": [
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "61cda2777b07d27459f5cac5a047c3edf9c8a1a9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "08165c296597075763130919f2aae59b5822f016",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "cb9055ba30306ede4ad920002233d0659982f1cb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "7a832b0f99be19df608cb75c023f8027b1789bd1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "89b465b54227c245ddc7cc9ed822231af21123ef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
                            "lessThan": "441f0647f7673e0e64d4910ef61a5fb8f16bfb82",
                            "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/sctp/inqueue.c"
                    ],
                    "versions": [
                        {
                            "version": "4.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.301",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.246",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.196",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.158",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.115",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.56",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.6",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "4.8",
                                    "versionEndExcluding": "5.4.301"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "5.10.246"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "5.15.196"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.1.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.6.115"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.12.56"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.17.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/61cda2777b07d27459f5cac5a047c3edf9c8a1a9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/08165c296597075763130919f2aae59b5822f016"
                },
                {
                    "url": "https://git.kernel.org/stable/c/03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cb9055ba30306ede4ad920002233d0659982f1cb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7a832b0f99be19df608cb75c023f8027b1789bd1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/89b465b54227c245ddc7cc9ed822231af21123ef"
                },
                {
                    "url": "https://git.kernel.org/stable/c/441f0647f7673e0e64d4910ef61a5fb8f16bfb82"
                }
            ],
            "title": "sctp: avoid NULL dereference when chunk data buffer is missing",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-16T19:41:12.884839Z",
                                "id": "CVE-2025-40240",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-16T19:41:24.741Z"
                }
            }
        ]
    }
}