{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74688",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.926Z",
        "datePublished": "2026-08-22T15:32:53.423Z",
        "dateUpdated": "2026-08-22T15:32:53.423Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-22T15:32:53.423Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: clear control chunk transport if it is being removed\n\nsctp_make_heartbeat_ack() caches the destination transport in\nchunk->transport without taking a reference. When src_out_of_asoc_ok is\nenabled, the HEARTBEAT ACK may remain queued on control_chunk_list instead\nof being transmitted immediately.\n\nIf the peer transport is removed while the chunk is still queued,\nsctp_assoc_rm_peer() drops the transport and schedules it for RCU freeing,\nbut only clears cached transport pointers in out_chunk_list.  The queued\ncontrol chunk therefore retains a dangling transport pointer.\n\nOnce an ASCONF_ACK clears the suppression and the queued control chunk is\ntransmitted, SCTP dereferences the stale transport pointer, leading to a\nuse-after-free.\n\nFix this by also clearing chunk->transport for queued control chunks in\ncontrol_chunk_list when removing the transport."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sctp/associola.c"
                    ],
                    "versions": [
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "fad4766a74220fe579c6fcaa10ba01c23529814f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "936658ec41c28c397ef390140e02d4c91ade92f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "8de65194a04d2552cd39b6c67d942d490f22d174",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "6160e756db81d6cb63e3e2952efcf6c5134be385",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "18d704bdd809377dfd81a3c2f42426763b5da227",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef",
                            "lessThan": "c9158ceaf27780ef64534ad72f44ffde3f8ccc49",
                            "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/associola.c"
                    ],
                    "versions": [
                        {
                            "version": "3.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.1",
                            "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": "3.1",
                                    "versionEndExcluding": "5.10.265"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "5.15.216"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "6.6.152"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "6.12.104"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "6.18.45"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "7.1.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.1",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fad4766a74220fe579c6fcaa10ba01c23529814f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/936658ec41c28c397ef390140e02d4c91ade92f0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8de65194a04d2552cd39b6c67d942d490f22d174"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6160e756db81d6cb63e3e2952efcf6c5134be385"
                },
                {
                    "url": "https://git.kernel.org/stable/c/18d704bdd809377dfd81a3c2f42426763b5da227"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c9158ceaf27780ef64534ad72f44ffde3f8ccc49"
                }
            ],
            "title": "sctp: clear control chunk transport if it is being removed",
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}