fkie_cve-2021-47088
Vulnerability from fkie_nvd
Published
2024-03-04 18:15
Modified
2025-01-16 17:20
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/damon/dbgfs: protect targets destructions with kdamond_lock DAMON debugfs interface iterates current monitoring targets in 'dbgfs_target_ids_read()' while holding the corresponding 'kdamond_lock'. However, it also destructs the monitoring targets in 'dbgfs_before_terminate()' without holding the lock. This can result in a use_after_free bug. This commit avoids the race by protecting the destruction with the corresponding 'kdamond_lock'.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/330c6117a82c16a9a365a51cec5c9ab30b13245cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34796417964b8d0aef45a99cf6c2d20cebe33733Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/330c6117a82c16a9a365a51cec5c9ab30b13245cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/34796417964b8d0aef45a99cf6c2d20cebe33733Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16


To clipboard 

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              "versionEndExcluding": "5.15.12",
              "versionStartIncluding": "5.15",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/dbgfs: protect targets destructions with kdamond_lock\n\nDAMON debugfs interface iterates current monitoring targets in\n\u0027dbgfs_target_ids_read()\u0027 while holding the corresponding\n\u0027kdamond_lock\u0027.  However, it also destructs the monitoring targets in\n\u0027dbgfs_before_terminate()\u0027 without holding the lock.  This can result in\na use_after_free bug.  This commit avoids the race by protecting the\ndestruction with the corresponding \u0027kdamond_lock\u0027."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/damon/dbgfs: protege las destrucciones de objetivos con kdamond_lock La interfaz DAMON debugfs itera los objetivos de monitoreo actuales en \u0027dbgfs_target_ids_read()\u0027 mientras mantiene el correspondiente \u0027kdamond_lock\u0027. Sin embargo, tambi\u00e9n destruye los objetivos de monitoreo en \u0027dbgfs_before_terminate()\u0027 sin mantener el bloqueo. Esto puede provocar un error use_after_free. Este compromiso evita la ejecuci\u00f3n protegiendo la destrucci\u00f3n con el correspondiente \u0027kdamond_lock\u0027."
    }
  ],
  "id": "CVE-2021-47088",
  "lastModified": "2025-01-16T17:20:45.687",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-03-04T18:15:07.510",
  "references": [
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      "tags": [
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  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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