fkie_cve-2021-47500
Vulnerability from fkie_nvd
Published
2024-05-24 15:15
Modified
2025-01-06 20:45
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: iio: mma8452: Fix trigger reference couting The mma8452 driver directly assigns a trigger to the struct iio_dev. The IIO core when done using this trigger will call `iio_trigger_put()` to drop the reference count by 1. Without the matching `iio_trigger_get()` in the driver the reference count can reach 0 too early, the trigger gets freed while still in use and a use-after-free occurs. Fix this by getting a reference to the trigger before assigning it to the IIO device.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071baPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071baPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96Patch
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 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "3842D18A-DF7B-40A7-994E-E7606663CB16",
                     versionEndExcluding: "4.4.295",
                     versionStartIncluding: "4.2",
                     vulnerable: true,
                  },
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "5D107324-F4B9-4146-BACC-391E95D41D67",
                     versionEndExcluding: "4.9.293",
                     versionStartIncluding: "4.5",
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "71B2A056-7541-4FF3-859E-C55955DDA2DD",
                     versionEndExcluding: "4.14.258",
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                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "CECDDE2F-DEEF-4D3A-85FF-6AEBA16D225B",
                     versionEndExcluding: "4.19.221",
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                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "B1DD3148-41FC-42AC-96A5-F63D774A97A3",
                     versionEndExcluding: "5.4.165",
                     versionStartIncluding: "4.20",
                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "D9668578-08F7-4694-A86F-FCE448387A79",
                     versionEndExcluding: "5.10.85",
                     versionStartIncluding: "5.5",
                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "6664ACE2-F748-4AE5-B98B-58803B0B2C3E",
                     versionEndExcluding: "5.15.8",
                     versionStartIncluding: "5.11",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
                     matchCriteriaId: "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644",
                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*",
                     matchCriteriaId: "60134C3A-06E4-48C1-B04F-2903732A4E56",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*",
                     matchCriteriaId: "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71",
                     vulnerable: true,
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                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*",
                     matchCriteriaId: "AF55383D-4DF2-45DC-93F7-571F4F978EAB",
                     vulnerable: true,
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               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\niio: mma8452: Fix trigger reference couting\n\nThe mma8452 driver directly assigns a trigger to the struct iio_dev. The\nIIO core when done using this trigger will call `iio_trigger_put()` to drop\nthe reference count by 1.\n\nWithout the matching `iio_trigger_get()` in the driver the reference count\ncan reach 0 too early, the trigger gets freed while still in use and a\nuse-after-free occurs.\n\nFix this by getting a reference to the trigger before assigning it to the\nIIO device.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: mma8452: corrección del cálculo de referencia del disparador El controlador mma8452 asigna directamente un disparador a la estructura iio_dev. El núcleo de IIO, cuando termine de usar este activador, llamará a `iio_trigger_put()` para reducir el recuento de referencias en 1. Sin el `iio_trigger_get()` coincidente en el controlador, el recuento de referencias puede llegar a 0 demasiado pronto, el activador se libera mientras aún está en se produce un uso y un use-after-free. Solucione este problema obteniendo una referencia al disparador antes de asignarlo al dispositivo IIO.",
      },
   ],
   id: "CVE-2021-47500",
   lastModified: "2025-01-06T20:45:22.063",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               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",
            },
            exploitabilityScore: 1.8,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-05-24T15:15:09.900",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         ],
         url: "https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba",
      },
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         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         url: "https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb",
      },
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         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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      },
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         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      },
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      },
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      },
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         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         ],
         url: "https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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         ],
         url: "https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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      },
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         tags: [
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         url: "https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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         url: "https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1",
      },
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         source: "af854a3a-2127-422b-91ae-364da2661108",
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         source: "af854a3a-2127-422b-91ae-364da2661108",
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   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-416",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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