{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.115-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  tracing: Do not initialize tracefs work if tracing is disabled  If trace buffer allocation fails during early boot (e.g.  in early_trace_init() -\u003e allocate_trace_buffers()), tracing_disabled is left set to 1 and the global trace array events list remains uninitialized.  Later during boot, tracer_init_tracefs() (invoked via fs_initcall) queues tracerfs_init_work asynchronously without checking if tracing was disabled.  When tracer_init_tracefs_work_func() runs, it calls event_trace_init() and init_tracer_tracefs(\u0026global_trace, NULL) unconditionally.  This leads to __find_event_file() dereferencing an uninitialized tr-\u003eevents list, causing an early boot NULL pointer dereference Oops:    BUG: Kernel NULL pointer dereference on read at 0x00000010   Faulting instruction address: 0xc000000000485be0   Oops: Kernel access of bad area, sig: 7 [#1]   ...   NIP [c000000000485be0] __find_event_file+0x70/0x3c0   LR  [c000000000448874] init_tracer_tracefs+0x274/0xc80   Call Trace:    init_tracer_tracefs+0x274/0xc80    tracer_init_tracefs_work_func+0x50/0x320    process_one_work+0x1e8/0x5c0    worker_thread+0x1dc/0x3d0    kthread+0x194/0x1b0    start_kernel_thread+0x14/0x18  Check tracing_disabled at the beginning of tracer_init_tracefs_work_func() and return immediately if tracing is disabled or failed to initialize, preventing the crash.",
  "id": "DEBIAN-CVE-2026-99247",
  "modified": "2026-11-04T04:47:28.067818459Z",
  "published": "2026-11-03T12:17:31.190Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-99247"
    }
  ],
  "upstream": [
    "CVE-2026-99247"
  ]
}