cve-2021-47500
Vulnerability from cvelistv5
Published
2024-05-24 15:01
Modified
2024-12-19 07:43
Severity ?
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 Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
Version: ae6d9ce05691bf79694074db7c7da980080548af
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\"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.295\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.293\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.258\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.221\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.165\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/iio/accel/mma8452.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"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.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T12:07:07.793Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-47500\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-04T12:07:07.793Z\", \"dateReserved\": \"2024-05-22T06:20:56.204Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-24T15:01:43.362Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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