{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-49854",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-10-21T12:17:06.016Z",
        "datePublished": "2024-10-21T12:18:46.723Z",
        "dateUpdated": "2024-10-21T13:04:11.371Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-10-21T12:18:46.723Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for accessing waker_bfqq after splitting\n\nAfter commit 42c306ed7233 (\"block, bfq: don't break merge chain in\nbfq_split_bfqq()\"), if the current procress is the last holder of bfqq,\nthe bfqq can be freed after bfq_split_bfqq(). Hence recored the bfqq and\nthen access bfqq->waker_bfqq may trigger UAF. What's more, the waker_bfqq\nmay in the merge chain of bfqq, hence just recored waker_bfqq is still\nnot safe.\n\nFix the problem by adding a helper bfq_waker_bfqq() to check if\nbfqq->waker_bfqq is in the merge chain, and current procress is the only\nholder."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/bfq-iosched.c"
                    ],
                    "versions": [
                        {
                            "version": "e0c20d88b7dc",
                            "lessThan": "63a07379fdb6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "de6c5e3a4560",
                            "lessThan": "de0456460f2a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "19f3bec2ac4b",
                            "lessThan": "0780451f03bf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "13b3d0e8cb12",
                            "lessThan": "0b8bda0ff171",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4780f50ea50c",
                            "lessThan": "cae58d19121a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "42c306ed7233",
                            "lessThan": "1ba0403ac644",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/bfq-iosched.c"
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/63a07379fdb6c72450cb05294461c6016b8b7726"
                },
                {
                    "url": "https://git.kernel.org/stable/c/de0456460f2abf921e356ed2bd8da87a376680bd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0780451f03bf518bc032a7c584de8f92e2d39d7f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0b8bda0ff17156cd3f60944527c9d8c9f99f1583"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cae58d19121a70329cf971359e2518c93fec04fe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1ba0403ac6447f2d63914fb760c44a3b19c44eaf"
                }
            ],
            "title": "block, bfq: fix uaf for accessing waker_bfqq after splitting",
            "x_generator": {
                "engine": "bippy-c9c4e1df01b2"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2024-49854",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-10-21T12:56:32.405058Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-10-21T13:04:11.371Z"
                }
            }
        ]
    }
}