fkie_cve-2021-47357
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-26 19:30
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: atm: iphase: fix possible use-after-free in ia_module_exit() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: iphase: fix possible use-after-free in ia_module_exit()\n\nThis module\u0027s remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver\u0027s remove function\nhas finished, which would result in a use-after-free.\n\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: iphase: corrige posible use after free en ia_module_exit(). La ruta de eliminaci\u00f3n de este m\u00f3dulo llama a del_timer(). Sin embargo, esa funci\u00f3n no espera hasta que finalice el controlador del temporizador. Esto significa que es posible que el controlador del temporizador a\u00fan est\u00e9 ejecut\u00e1ndose despu\u00e9s de que haya finalizado la funci\u00f3n de eliminaci\u00f3n del controlador, lo que dar\u00eda como resultado un use after free. Para solucionarlo, llame a del_timer_sync(), lo que garantiza que el controlador del temporizador haya finalizado y no pueda reprogramarse."
    }
  ],
  "id": "CVE-2021-47357",
  "lastModified": "2024-12-26T19:30:01.220",
  "metrics": {
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
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  "published": "2024-05-21T15:15:22.000",
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}


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