CVE-2021-47357 (GCVE-0-2021-47357)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2025-05-04 07:09
Severity ?
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-8c081fb06d67 https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b Patch
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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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 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      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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