fkie_cve-2022-48771
Vulnerability from fkie_nvd
Published
2024-06-20 12:15
Modified
2025-01-06 21:41
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: drm/vmwgfx: Fix stale file descriptors on failed usercopy A failing usercopy of the fence_rep object will lead to a stale entry in the file descriptor table as put_unused_fd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios. Fix this by deferring the call to fd_install() until after the usercopy has succeeded.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516Patch
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 5.17


To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Fix stale file descriptors on failed usercopy\n\nA failing usercopy of the fence_rep object will lead to a stale entry in\nthe file descriptor table as put_unused_fd() won\u0027t release it. This\nenables userland to refer to a dangling \u0027file\u0027 object through that still\nvalid file descriptor, leading to all kinds of use-after-free\nexploitation scenarios.\n\nFix this by deferring the call to fd_install() until after the usercopy\nhas succeeded."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/vmwgfx: corrige descriptores de archivos obsoletos en una copia de usuario fallida. Una copia de usuario fallida del objeto valla_rep generar\u00e1 una entrada obsoleta en la tabla de descriptores de archivos, ya que put_unused_fd() no lo liberar\u00e1. Esto permite al usuario hacer referencia a un objeto \u0027archivo\u0027 pendiente a trav\u00e9s de ese descriptor de archivo a\u00fan v\u00e1lido, lo que lleva a todo tipo de escenarios de explotaci\u00f3n de use-after-free. Solucione este problema posponiendo la llamada a fd_install() hasta que la copia del usuario se haya realizado correctamente."
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  "id": "CVE-2022-48771",
  "lastModified": "2025-01-06T21:41:47.617",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
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          "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-06-20T12:15:15.043",
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}


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