{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "591dffdade9f07692a7dd3ed16830ec24e901ece"
            },
            {
              "fixed": "83fd7eca5ab0d3ac3f23bff889175d847e21af06"
            },
            {
              "fixed": "cee8f286794df916553d8d445eac5c323ec5b0f8"
            },
            {
              "fixed": "9100191e5acb2e5ea2313f436667bb5fce129f47"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.15.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90002.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Take trace_array reference before accessing its ftrace_ops\n\nThe trace instance files set_ftrace_filter and set_ftrace_notrace was\nupdated to work with specific trace instances (trace_arrays). The issue is\nthat when these files are opened, there is a small race window where it\nwill use the ftrace_ops from the inode-\u003eprivate pointer to get a reference\nto the trace_array and then take its reference. The problem is that the\nftrace_ops itself could be freed. If the rmdir on the instance happens at\nthe same time the set_ftrace_filter file is opened, the rmdir could have\nalso freed the ftrace_ops and referencing it will cause a use-after-free\nbug and crash the kernel.\n\nInstead, pass in the trace_array as the file private data (NULL for the\ntop level instance), and then pass both the trace_array and the ftrace_ops\nto the ftrace_regex_open() function. If the trace_array is NULL, then it\njust uses the ftrace_ops without the need to take its reference (like\nnormal). If the ftrace_ops is NULL, that is only the case for the top\nlevel instance and the global_ops can be used.\n\nThis allows the trace_array to have its reference incremented before\ntouching the ftrace_ops that could also be freed when the instance is.",
  "id": "CVE-2026-90002",
  "modified": "2026-09-18T03:30:57.493432697Z",
  "published": "2026-09-16T10:33:12.734Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83fd7eca5ab0d3ac3f23bff889175d847e21af06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9100191e5acb2e5ea2313f436667bb5fce129f47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cee8f286794df916553d8d445eac5c323ec5b0f8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90002.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90002"
    },
    {
      "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": "ftrace: Take trace_array reference before accessing its ftrace_ops"
}