FKIE_CVE-2026-90013

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-10-30 13:20
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Take trace_array reference when opening options file The options files do not take the trace_array reference for the options they represent. This could cause a use-after-free kernel crash if one of these files is opened by one task and another task removes the instance that the option is for. Because it doesn't take a reference upon opening, it will not stop the removal which will free the options descriptor that is being used. As the options are somewhat dynamic in their creation at boot up, each file represents a flag in the trace_array. The trace_array has an array of indexes to represent each of these flags that is stored in the trace_flags_index array. The address of the index array element is used to pass to the inode->i_private pointer. Then that element is read which holds the index (which represents the flag) and then the index is used to calculate the trace_array descriptor from its trace_flags_index array. One issue is that the index element can not be referenced until the trace_array's reference is taken. To handle this, create a new helper function called: trace_array_options_get() that will iterate all the existing trace_arrays in the ftrace_trace_arrays list (under the trace_types_lock), and compare the passed in address of the index element with the entire array of the trace_array's trace_flags_index array. If it matches, then up the corresponding trace_array's reference and return.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64a41f4a9a968f54f3792399aa4d2a9fdb23b0a5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8cc9c5a8c559d655c32d2190486e89574c14ff52
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97ceaffbd672449ad7ead5ae8788dce16374b0c1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a6e15eadfdb6de30c24ef21b31f39a86359f4ab5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d0f37d77b9b4b241e0b30ef2562f6353cbda3bec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2951ebd15c36a1ea4820a7f0cbb0b5f1c028b73
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a6e15eadfdb6de30c24ef21b31f39a86359f4ab5",
              "status": "affected",
              "version": "577b785f55168d5acb3d123ba41bfe8d7981e044",
              "versionType": "git"
            },
            {
              "lessThan": "8cc9c5a8c559d655c32d2190486e89574c14ff52",
              "status": "affected",
              "version": "577b785f55168d5acb3d123ba41bfe8d7981e044",
              "versionType": "git"
            },
            {
              "lessThan": "97ceaffbd672449ad7ead5ae8788dce16374b0c1",
              "status": "affected",
              "version": "577b785f55168d5acb3d123ba41bfe8d7981e044",
              "versionType": "git"
            },
            {
              "lessThan": "d0f37d77b9b4b241e0b30ef2562f6353cbda3bec",
              "status": "affected",
              "version": "577b785f55168d5acb3d123ba41bfe8d7981e044",
              "versionType": "git"
            },
            {
              "lessThan": "64a41f4a9a968f54f3792399aa4d2a9fdb23b0a5",
              "status": "affected",
              "version": "577b785f55168d5acb3d123ba41bfe8d7981e044",
              "versionType": "git"
            },
            {
              "lessThan": "f2951ebd15c36a1ea4820a7f0cbb0b5f1c028b73",
              "status": "affected",
              "version": "577b785f55168d5acb3d123ba41bfe8d7981e044",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.30"
            },
            {
              "lessThan": "2.6.30",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Take trace_array reference when opening options file\n\nThe options files do not take the trace_array reference for the options\nthey represent. This could cause a use-after-free kernel crash if one of\nthese files is opened by one task and another task removes the instance\nthat the option is for. Because it doesn\u0027t take a reference upon opening,\nit will not stop the removal which will free the options descriptor that\nis being used.\n\nAs the options are somewhat dynamic in their creation at boot up, each\nfile represents a flag in the trace_array. The trace_array has an array of\nindexes to represent each of these flags that is stored in the\ntrace_flags_index array. The address of the index array element is used to\npass to the inode-\u003ei_private pointer. Then that element is read which\nholds the index (which represents the flag) and then the index is used to\ncalculate the trace_array descriptor from its trace_flags_index array.\n\nOne issue is that the index element can not be referenced until the\ntrace_array\u0027s reference is taken. To handle this, create a new helper\nfunction called: trace_array_options_get() that will iterate all the\nexisting trace_arrays in the ftrace_trace_arrays list (under the\ntrace_types_lock), and compare the passed in address of the index element\nwith the entire array of the trace_array\u0027s trace_flags_index array.\nIf it matches, then up the corresponding trace_array\u0027s reference and\nreturn."
    }
  ],
  "id": "CVE-2026-90013",
  "lastModified": "2026-10-30T13:20:38.660",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-16T11:17:13.997",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/64a41f4a9a968f54f3792399aa4d2a9fdb23b0a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8cc9c5a8c559d655c32d2190486e89574c14ff52"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97ceaffbd672449ad7ead5ae8788dce16374b0c1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a6e15eadfdb6de30c24ef21b31f39a86359f4ab5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d0f37d77b9b4b241e0b30ef2562f6353cbda3bec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f2951ebd15c36a1ea4820a7f0cbb0b5f1c028b73"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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