cve-2021-47500
Vulnerability from cvelistv5
Published
2024-05-24 15:01
Modified
2024-12-19 07:43
Severity ?
EPSS score ?
Summary
iio: mma8452: Fix trigger reference couting
References
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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." } ], "providerMetadata": { "dateUpdated": "2024-12-19T07:43:39.544Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba" }, { "url": "https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96" }, { "url": "https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb" }, { "url": "https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8" }, { "url": "https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e" }, { "url": "https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1" }, { "url": "https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739" }, { "url": "https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892" } ], "title": "iio: mma8452: Fix trigger reference couting", "x_generator": { "engine": "bippy-5f407fcff5a0" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-47500", "datePublished": "2024-05-24T15:01:43.362Z", "dateReserved": "2024-05-22T06:20:56.204Z", "dateUpdated": "2024-12-19T07:43:39.544Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-47500\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:09.900\",\"lastModified\":\"2025-01-06T20:45:22.063\",\"vulnStatus\":\"Analyzed\",\"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: correcci\u00f3n del c\u00e1lculo de referencia del disparador El controlador mma8452 asigna directamente un disparador a la estructura iio_dev. El n\u00facleo de IIO, cuando termine de usar este activador, llamar\u00e1 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 a\u00fan est\u00e1 en se produce un uso y un use-after-free. Solucione este problema obteniendo una referencia al disparador antes de asignarlo al dispositivo IIO.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2\",\"versionEndExcluding\":\"4.4.295\",\"matchCriteriaId\":\"3842D18A-DF7B-40A7-994E-E7606663CB16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.5\",\"versionEndExcluding\":\"4.9.293\",\"matchCriteriaId\":\"5D107324-F4B9-4146-BACC-391E95D41D67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.258\",\"matchCriteriaId\":\"71B2A056-7541-4FF3-859E-C55955DDA2DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.221\",\"matchCriteriaId\":\"CECDDE2F-DEEF-4D3A-85FF-6AEBA16D225B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.165\",\"matchCriteriaId\":\"B1DD3148-41FC-42AC-96A5-F63D774A97A3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.85\",\"matchCriteriaId\":\"D9668578-08F7-4694-A86F-FCE448387A79\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.8\",\"matchCriteriaId\":\"6664ACE2-F748-4AE5-B98B-58803B0B2C3E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E46C74C6-B76B-4C94-A6A4-FD2FFF62D644\"},{\"vulnerable\":true,\"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,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"AF55383D-4DF2-45DC-93F7-571F4F978EAB\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/db12d95085367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} }
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.