{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  perf: Fix null pointer access in is_include_guest_event()  A typical module unload occurring event when there is an active perf connection leads to freeing of the pmu pointer. The call log is something like:  ..  __pmu_detach_event  pmu_detach_event  pmu_detach_events  perf_pmu_unregister  ..  __pmu_detach_event() sets event-\u003epmu to null. When the perf connection finally is closed, the following stack trace is observed:   Oops: general protection fault, kernel NULL pointer dereference  ...  RIP: 0010:_free_event+0x3e/0x370  ...  Call Trace:  ...  perf_event_release_kernel+0x260/0x2d0  perf_release+0x12/0x20  A call to mediated_pmu_unaccount_event() inside _free_event() is the root cause of this crash. Adding a check inside is_include_guest_event() ensures we don't accidentally access a null pmu ptr. In addition to this, we will now call mediated_pmu_unaccount_event() before clearing the pmu ptr so that nr_include_guest_events counts are maintained correctly.",
  "id": "DEBIAN-CVE-2026-98268",
  "modified": "2026-10-07T04:47:30.862119282Z",
  "published": "2026-10-06T09:18:16.227Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98268"
    }
  ],
  "upstream": [
    "CVE-2026-98268"
  ]
}