{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ae63b31e4d0e2ec09c569306ea46f664508ef717"
            },
            {
              "fixed": "3bf965a2827c44f03294107703e7ba53fbd0a69a"
            },
            {
              "fixed": "9d6d79744f01eacaf3d5522f4fcd59939581abfd"
            },
            {
              "fixed": "54b7a358f6399c1242d2fb7f4f96085af34baa5e"
            },
            {
              "fixed": "d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5"
            },
            {
              "fixed": "22f954f7a8afe975e85517aff41b35defe05144b"
            },
            {
              "fixed": "cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca"
            },
            {
              "fixed": "000765dcdc3edf128990762790543adc4b868f6c"
            },
            {
              "fixed": "ac8719969e6c3c54e939834df812bc41f25453cf"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.10.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.151"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "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/2026/74xxx/CVE-2026-74471.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Check return value of __register_event() in trace_module_add_events()\n\ntrace_module_add_events() ignores the return value of __register_event()\nand unconditionally calls __add_event_to_tracers() for each event.\n\nIf __register_event() fails (for example, if event_init() fails), the\ntrace_event_call is not added to ftrace_events list, but\n__add_event_to_tracers() still creates a trace_event_file pointing to it.\nIf module loading subsequently fails and module memory is freed, tracing\nstate retains a stale trace_event_call pointer in trace_event_file,\nleading to a use-after-free when tracefs or tracing subsystem operations\nare later executed.\n\nFix this by checking the return value of __register_event() and only\ncalling __add_event_to_tracers() if event registration succeeded.",
  "id": "CVE-2026-74471",
  "modified": "2026-08-21T03:30:14.227897888Z",
  "published": "2026-08-15T12:27:08.128Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/000765dcdc3edf128990762790543adc4b868f6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22f954f7a8afe975e85517aff41b35defe05144b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bf965a2827c44f03294107703e7ba53fbd0a69a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54b7a358f6399c1242d2fb7f4f96085af34baa5e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d6d79744f01eacaf3d5522f4fcd59939581abfd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac8719969e6c3c54e939834df812bc41f25453cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74471.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74471"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "tracing: Check return value of __register_event() in trace_module_add_events()"
}