FKIE_CVE-2021-47511

Vulnerability from fkie_nvd - Published: 2024-05-24 15:15 - Updated: 2025-09-29 17:09
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix negative period/buffer sizes The period size calculation in OSS layer may receive a negative value as an error, but the code there assumes only the positive values and handle them with size_t. Due to that, a too big value may be passed to the lower layers. This patch changes the code to handle with ssize_t and adds the proper error checks appropriately.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/00a860678098fcd9fa8db2b5fb9d2ddf4776d4ccPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/02b2b691b77cd7b951fa7b6c9d44d4e472cdc823Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/502e1146873d870f87da3b8f93d6bf2de5f38d0cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8af815ab052eaf74addbbfb556d63ce2137c0e1bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d2479c960875ca1239bcb899f386970c13d9cfePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be8869d388593e57223ad39297c8e54be632f2f2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f12c8a7515f641885677960af450082569a87243Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f96c0959c1ee92adc911c10d6ec209af50105049Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/00a860678098fcd9fa8db2b5fb9d2ddf4776d4ccPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/02b2b691b77cd7b951fa7b6c9d44d4e472cdc823Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/502e1146873d870f87da3b8f93d6bf2de5f38d0cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8af815ab052eaf74addbbfb556d63ce2137c0e1bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9d2479c960875ca1239bcb899f386970c13d9cfePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/be8869d388593e57223ad39297c8e54be632f2f2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f12c8a7515f641885677960af450082569a87243Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f96c0959c1ee92adc911c10d6ec209af50105049Patch
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 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: oss: Fix negative period/buffer sizes\n\nThe period size calculation in OSS layer may receive a negative value\nas an error, but the code there assumes only the positive values and\nhandle them with size_t.  Due to that, a too big value may be passed\nto the lower layers.\n\nThis patch changes the code to handle with ssize_t and adds the proper\nerror checks appropriately."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: pcm: oss: corrige tama\u00f1os de per\u00edodo/b\u00fafer negativos El c\u00e1lculo del tama\u00f1o del per\u00edodo en la capa OSS puede recibir un valor negativo como error, pero el c\u00f3digo all\u00ed asume solo los valores positivos y manejarlos con size_t. Debido a esto, es posible que se pase un valor demasiado grande a las capas inferiores. Este parche cambia el c\u00f3digo para manejar con ssize_t y agrega las comprobaciones de errores adecuadas."
    }
  ],
  "id": "CVE-2021-47511",
  "lastModified": "2025-09-29T17:09:23.837",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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  "published": "2024-05-24T15:15:12.237",
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  "vulnStatus": "Analyzed",
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.