{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99247",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.403Z",
        "datePublished": "2026-11-03T11:18:26.163Z",
        "dateUpdated": "2026-11-03T11:18:26.163Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-11-03T11:18:26.163Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Do not initialize tracefs work if tracing is disabled\n\nIf trace buffer allocation fails during early boot (e.g.  in\nearly_trace_init() -> allocate_trace_buffers()), tracing_disabled is\nleft set to 1 and the global trace array events list remains\nuninitialized.\n\nLater during boot, tracer_init_tracefs() (invoked via fs_initcall)\nqueues tracerfs_init_work asynchronously without checking if tracing was\ndisabled.  When tracer_init_tracefs_work_func() runs, it calls\nevent_trace_init() and init_tracer_tracefs(&global_trace, NULL)\nunconditionally.  This leads to __find_event_file() dereferencing an\nuninitialized tr->events list, causing an early boot NULL pointer\ndereference Oops:\n\n  BUG: Kernel NULL pointer dereference on read at 0x00000010\n  Faulting instruction address: 0xc000000000485be0\n  Oops: Kernel access of bad area, sig: 7 [#1]\n  ...\n  NIP [c000000000485be0] __find_event_file+0x70/0x3c0\n  LR  [c000000000448874] init_tracer_tracefs+0x274/0xc80\n  Call Trace:\n   init_tracer_tracefs+0x274/0xc80\n   tracer_init_tracefs_work_func+0x50/0x320\n   process_one_work+0x1e8/0x5c0\n   worker_thread+0x1dc/0x3d0\n   kthread+0x194/0x1b0\n   start_kernel_thread+0x14/0x18\n\nCheck tracing_disabled at the beginning of tracer_init_tracefs_work_func()\nand return immediately if tracing is disabled or failed to initialize,\npreventing the crash."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/trace/trace.c"
                    ],
                    "versions": [
                        {
                            "version": "6621a7004684bfcff5af4c8e4d37989941f42a6b",
                            "lessThan": "e8665e884e076d894f3eed8b9ea28e37a6448604",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6621a7004684bfcff5af4c8e4d37989941f42a6b",
                            "lessThan": "e8cfcd7e60eaa3b0dea4d71c64499604e7081736",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6621a7004684bfcff5af4c8e4d37989941f42a6b",
                            "lessThan": "afd38b10b1c6a5c5d6952b15b990596dab9684e6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6621a7004684bfcff5af4c8e4d37989941f42a6b",
                            "lessThan": "813e18881c6472eb229a63180ff42c808e3e949b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6621a7004684bfcff5af4c8e4d37989941f42a6b",
                            "lessThan": "7539c61f522ff693d9565a0411386c2236e776cd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6621a7004684bfcff5af4c8e4d37989941f42a6b",
                            "lessThan": "b3b974008388ab59e44d764ba7a63c988fec2524",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/trace/trace.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.191",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.161",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.115",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.59",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.13",
                            "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": "5.19",
                                    "versionEndExcluding": "6.1.191"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.6.161"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.115"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.18.59"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.2.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e8665e884e076d894f3eed8b9ea28e37a6448604"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e8cfcd7e60eaa3b0dea4d71c64499604e7081736"
                },
                {
                    "url": "https://git.kernel.org/stable/c/afd38b10b1c6a5c5d6952b15b990596dab9684e6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/813e18881c6472eb229a63180ff42c808e3e949b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7539c61f522ff693d9565a0411386c2236e776cd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b3b974008388ab59e44d764ba7a63c988fec2524"
                }
            ],
            "title": "tracing: Do not initialize tracefs work if tracing is disabled",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}