{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f984b51e0779a6dd30feedc41404013ca54e5d05"
            },
            {
              "fixed": "876014b4eeb927146430e7591cf959a7ceb8d64a"
            },
            {
              "fixed": "a20a0010eb6485f60cd64e15ebc85a4bd388642e"
            },
            {
              "fixed": "60234845142fddb27db89ebc00a65178421fb3a4"
            },
            {
              "fixed": "12b80cdbc54cf615b4717a4e8180063408091ea2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.27"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80689.json"
  },
  "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": "CVE-2026-80689",
  "modified": "2026-08-30T03:30:41.145844832Z",
  "published": "2026-08-28T06:52:53.724Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80689.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80689"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions"
}