fkie_cve-2023-52503
Vulnerability from fkie_nvd
Published
2024-03-02 22:15
Modified
2024-12-10 21:26
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: tee: amdtee: fix use-after-free vulnerability in amdtee_close_session There is a potential race condition in amdtee_close_session that may cause use-after-free in amdtee_open_session. For instance, if a session has refcount == 1, and one thread tries to free this session via: kref_put(&sess->refcount, destroy_session); the reference count will get decremented, and the next step would be to call destroy_session(). However, if in another thread, amdtee_open_session() is called before destroy_session() has completed execution, alloc_session() may return 'sess' that will be freed up later in destroy_session() leading to use-after-free in amdtee_open_session. To fix this issue, treat decrement of sess->refcount and removal of 'sess' from session list in destroy_session() as a critical section, so that it is executed atomically.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0cePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0cePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8fPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6


To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: amdtee: fix use-after-free vulnerability in amdtee_close_session\n\nThere is a potential race condition in amdtee_close_session that may\ncause use-after-free in amdtee_open_session. For instance, if a session\nhas refcount == 1, and one thread tries to free this session via:\n\n    kref_put(\u0026sess-\u003erefcount, destroy_session);\n\nthe reference count will get decremented, and the next step would be to\ncall destroy_session(). However, if in another thread,\namdtee_open_session() is called before destroy_session() has completed\nexecution, alloc_session() may return \u0027sess\u0027 that will be freed up\nlater in destroy_session() leading to use-after-free in\namdtee_open_session.\n\nTo fix this issue, treat decrement of sess-\u003erefcount and removal of\n\u0027sess\u0027 from session list in destroy_session() as a critical section, so\nthat it is executed atomically."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tee: amdtee: corrige la vulnerabilidad de Use After Free en amdtee_close_session Existe una posible condici\u00f3n de ejecuci\u00f3n en amdtee_close_session que puede causar el Use After Free en amdtee_open_session. Por ejemplo, si una sesi\u00f3n tiene refcount == 1 y un hilo intenta liberar esta sesi\u00f3n mediante: kref_put(\u0026amp;sess-\u0026gt;refcount, destroy_session); el recuento de referencias disminuir\u00e1 y el siguiente paso ser\u00eda llamar a destroy_session(). Sin embargo, si en otro hilo, se llama a amdtee_open_session() antes de que destroy_session() haya completado la ejecuci\u00f3n, alloc_session() puede devolver \u0027sess\u0027 que se liberar\u00e1 m\u00e1s tarde en destroy_session(), lo que conducir\u00e1 a Use After Free en amdtee_open_session. Para solucionar este problema, trate la disminuci\u00f3n de sess-\u0026gt;refcount y la eliminaci\u00f3n de \u0027sess\u0027 de la lista de sesiones en destroy_session() como una secci\u00f3n cr\u00edtica, para que se ejecute de forma at\u00f3mica."
    }
  ],
  "id": "CVE-2023-52503",
  "lastModified": "2024-12-10T21:26:43.377",
  "metrics": {
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        "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"
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        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-03-02T22:15:47.250",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-416"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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