FKIE_CVE-2021-47259

Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2025-04-04 14:30
Severity ?
7.5 (High) - CVSS:3.1/AV:N/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: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329abPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329abPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix use-after-free in nfs4_init_client()\n\nKASAN reports a use-after-free when attempting to mount two different\nexports through two different NICs that belong to the same server.\n\nOlga was able to hit this with kernels starting somewhere between 5.7\nand 5.10, but I traced the patch that introduced the clear_bit() call to\n4.13. So something must have changed in the refcounting of the clp\npointer to make this call to nfs_put_client() the very last one."
    },
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      "lang": "es",
      "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: core: corrige el manejo de errores de scsi_host_alloc(). Despu\u00e9s de que el dispositivo se inicializa mediante device_initialize(), o su nombre se establece mediante dev_set_name(), el dispositivo debe liberarse mediante put_device (). De lo contrario, se filtrar\u00e1 el nombre del dispositivo porque se asigna din\u00e1micamente en dev_set_name(). Solucione la fuga reemplazando kfree() con put_device(). Dado que scsi_host_dev_release() maneja adecuadamente la eliminaci\u00f3n de IDA y kthread, elimine tambi\u00e9n estas may\u00fasculas y min\u00fasculas especiales del manejo de errores."
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  "id": "CVE-2021-47259",
  "lastModified": "2025-04-04T14:30:09.120",
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          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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}


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