GHSA-6Q77-H2MR-VRM4

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-28 09:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions

mmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into tr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map(). If these functions are invoked while mmio_trace_array is NULL (e.g. before initialization or after disabled), accessing tr->array_buffer.buffer will result in a NULL pointer dereference crash.

Fix this by adding an explicit NULL check for tr at the beginning of __trace_mmiotrace_rw() and __trace_mmiotrace_map().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80689"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:54Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions\n\nmmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into\ntr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map().\nIf these functions are invoked while mmio_trace_array is NULL (e.g. before\ninitialization or after disabled), accessing tr-\u003earray_buffer.buffer will\nresult in a NULL pointer dereference crash.\n\nFix this by adding an explicit NULL check for tr at the beginning of\n__trace_mmiotrace_rw() and __trace_mmiotrace_map().",
  "id": "GHSA-6q77-h2mr-vrm4",
  "modified": "2026-08-28T09:31:49Z",
  "published": "2026-08-28T09:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80689"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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