{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98742",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.367Z",
        "datePublished": "2026-10-18T15:47:27.137Z",
        "dateUpdated": "2026-10-21T12:56:17.857Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:56:17.857Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: Serialize compat port-info ioctls\n\nThe native sequencer ioctl path serializes handler calls with\nclient->ioctl_mutex, but the translated port-info compat path invokes the\nsame handlers through snd_seq_kernel_client_ctl() without taking that\nmutex.\n\nThis lets concurrent compat CREATE_PORT requests pass the port-count\ncheck before any request reaches the serialized insertion. The computed\ninteger port index can then exceed the address field range and wrap to an\nexisting index. Subsequent subscriber teardown can resolve the duplicate\naddress to the wrong port and access a freed subscriber.\n\nTake ioctl_mutex while dispatching converted port-info requests, matching\nthe native ioctl path. All translated port-info commands share this\nhelper, so their accesses to the client port state are serialized as\nwell."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/core/seq/seq_compat.c"
                    ],
                    "versions": [
                        {
                            "version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
                            "lessThan": "2db234e163f0d211b69a4eebbec8aacc5a54a80e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
                            "lessThan": "413211dd31cb2ef2fc99fb0aa1a037a97509502c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
                            "lessThan": "fc5c52848e405b6efb073db5035bb9ebaed11ec4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
                            "lessThan": "702d92f361f65d9698c473c7599d471395dc4341",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
                            "lessThan": "95b2e0361c88753afa030c10698be0a1a5b67650",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d6693160906d55ba376bf0b88b7c129762170162",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "02cbce8576a31df8fca54aaec91ee081076bd79d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6aab3aa52366a0051e5abf8aae4616c42053fd8e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f8a38ab4cd9624fc5ac8a7f965c7b20f5b62c03c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "623e5c8ae32b39cc8baea83478695dc624935318",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e4ff9f294629b65df3f7982cd4faf86b2856b9d7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3162384aed4cfe3f1a1f40041f3ba8cd7704d88",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3.2.99",
                            "lessThan": "3.3",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.16.54",
                            "lessThan": "3.17",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.18.94",
                            "lessThan": "3.19",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.1.50",
                            "lessThan": "4.2",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.4.115",
                            "lessThan": "4.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.9.78",
                            "lessThan": "4.10",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.15",
                            "lessThan": "4.15",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/core/seq/seq_compat.c"
                    ],
                    "versions": [
                        {
                            "version": "4.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.56",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.10",
                            "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": "4.15",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.15",
                                    "versionEndExcluding": "6.12.113"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "4.15",
                                    "versionEndExcluding": "7.3"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2.99"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.1.50"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.4.115"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.9.78"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.14.15"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2db234e163f0d211b69a4eebbec8aacc5a54a80e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/413211dd31cb2ef2fc99fb0aa1a037a97509502c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fc5c52848e405b6efb073db5035bb9ebaed11ec4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/702d92f361f65d9698c473c7599d471395dc4341"
                },
                {
                    "url": "https://git.kernel.org/stable/c/95b2e0361c88753afa030c10698be0a1a5b67650"
                }
            ],
            "title": "ALSA: seq: Serialize compat port-info ioctls",
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}